File Coverage

blib/lib/WWW/YouTube/Download.pm

Criterion	Covered	Total	%
statement	111	339	32.7
branch	29	178	16.2
condition	1	148	0.6
subroutine	23	45	51.1
pod	9	9	100.0
total	173	719	24.0

package WWW::YouTube::Download;

use strict;
use warnings;
use 5.008001;

our $VERSION = '0.64';

use Carp qw(croak);
use URI ();
use LWP::UserAgent;
use JSON::MaybeXS 'JSON';
use HTML::Entities qw/decode_entities/;
use HTTP::Request;
use MIME::Type;

$Carp::Internal{ (__PACKAGE__) }++;

use constant DEFAULT_FMT => 18;

my $base_url = 'https://www.youtube.com/watch?v=';

sub new {
    my $class = shift;
    my %args = @_;
    $args{ua} = LWP::UserAgent->new(
        agent      => __PACKAGE__.'/'.$VERSION,
        parse_head => 0,
    ) unless exists $args{ua};
    bless \%args, $class;
}

for my $name (qw[video_id video_url title user fmt fmt_list suffix]) {
    ## no critic (TestingAndDebugging::ProhibitNoStrict)
    no strict 'refs';
    *{"get_$name"} = sub {
        use strict 'refs';
        my ($self, $video_id) = @_;
        croak "Usage: $self->get_$name(\$video_id|\$watch_url)" unless $video_id;
        my $data = $self->prepare_download($video_id);
        return $data->{$name};
    };
}

sub playback_url {
    my ($self, $video_id, $args) = @_;
    croak "Usage: $self->playback_url('[video_id|video_url]')" unless $video_id;
    $args ||= {};

    my $data = $self->prepare_download($video_id);
    my $fmt  = $args->{fmt} || $data->{fmt} || DEFAULT_FMT;
    my $video_url = $data->{video_url_map}{$fmt}{url} || croak "this video does not offer format (fmt) $fmt";

    return $video_url;
}

sub download {
    my ($self, $video_id, $args) = @_;
    croak "Usage: $self->download('[video_id|video_url]')" unless $video_id;
    $args ||= {};

    my $data = $self->prepare_download($video_id);

    my $fmt = $args->{fmt} || $data->{fmt} || DEFAULT_FMT;

    my $video_url = $data->{video_url_map}{$fmt}{url} || croak "this video has not supported fmt: $fmt";
    $args->{filename} ||= $args->{file_name};
    my $filename = $self->_format_filename($args->{filename}, {
        video_id   => $data->{video_id},
        title      => $data->{title},
        user       => $data->{user},
        fmt        => $fmt,
        suffix     => $data->{video_url_map}{$fmt}{suffix} || _suffix($fmt),
        resolution => $data->{video_url_map}{$fmt}{resolution} || '0x0',
    });

    $args->{cb} = $self->_default_cb({
        filename  => $filename,
        verbose   => $args->{verbose},
        progress  => $args->{progress},
        overwrite => defined $args->{overwrite} ? $args->{overwrite} : 1,
    }) unless ref $args->{cb} eq 'CODE';

    my $res = $self->ua->get($video_url, ':content_cb' => $args->{cb});
    croak "!! $video_id download failed: ", $res->status_line if $res->is_error;
}

sub _format_filename {
    my ($self, $filename, $data) = @_;
    return "$data->{video_id}.$data->{suffix}" unless defined $filename;
    $filename =~ s#{([^}]+)}#$data->{$1} || "{$1}"#eg;
    return $filename;
}

sub _is_supported_fmt {
    my ($self, $video_id, $fmt) = @_;
    my $data = $self->prepare_download($video_id);
    defined($data->{video_url_map}{$fmt}{url}) ? 1 : 0;
}

sub _progress {
    my ($self, $args, $total) = @_;

    if (not defined $args->{_progress}) {
        eval "require Term::ProgressBar" or return;    ## no critic
        $args->{_progress} = Term::ProgressBar->new( { count => $total, ETA => 'linear', remove => 0, fh => \*STDOUT } );
        $args->{_progress}->minor( $total > 50_000_000 ? 1 : 0 );
        $args->{_progress}->max_update_rate(1);

        $args->{_progress}->message("Total $total");
    }

    return $args->{_progress};
}

sub _default_cb {
    my ($self, $args) = @_;
    my ($file, $verbose, $overwrite, $progress) = @$args{qw/filename verbose overwrite progress/};

    croak "file exists! $file" if -f $file and !$overwrite;
    open my $wfh, '>', $file or croak $file, " $!";
    binmode $wfh;

    print "Downloading `$file`\n" if $verbose;
    return sub {
        my ($chunk, $res, $proto) = @_;
        print $wfh $chunk; # write file

        if ($verbose || $self->{verbose}) {
            my $size = tell $wfh;
            my $total = $res->header('Content-Length');

            if ($progress) {
                if (my $p = $self->_progress($args, $total)){
                    $p->update($size);
                    return;
                }
                else{
                    print "(You need Term::ProgressBar module to show progress bar with -P switch)\n";
                    $progress = 0;
                }
            }

            printf "%d/%d (%.2f%%)\r", $size, $total, $size / $total * 100;
            print "\n" if $total == $size;
        }
    };
}

sub prepare_download {
    my ($self, $video_id) = @_;
    croak "Usage: $self->prepare_download('[video_id|watch_url]')" unless $video_id;
    $video_id = $self->video_id($video_id);

    return $self->{cache}{$video_id} if ref $self->{cache}{$video_id} eq 'HASH';

    my ($title, $user, $video_url_map);
    my $content = $self->_get_content($video_id);
    if ($self->_is_new($content)) {
      my $args        = $self->_get_args($content);
      my $player_resp = JSON()->new->decode($args->{player_response});
      $video_url_map  = $self->_decode_player_response($player_resp);
      $title          = decode_entities $player_resp->{videoDetails}{title};
      $user           = decode_entities $player_resp->{videoDetails}{author};
    } else {
      $title         = $self->_fetch_title($content);
      $user          = $self->_fetch_user($content);
      $video_url_map = $self->_fetch_video_url_map($content);
    }

    my $fmt_list = [];
    my $sorted = [
        map {
            push @$fmt_list, $_->[0]->{fmt};
            $_->[0]
        } sort {
            $b->[1] <=> $a->[1]
        } map {
            my $resolution = $_->{resolution};
            $resolution =~ s/(\d+)x(\d+)/$1 * $2/e;
            [ $_, $resolution ]
        } values %$video_url_map,
    ];

    my $hq_data = $sorted->[0];

    return $self->{cache}{$video_id} = {
        video_id      => $video_id,
        video_url     => $hq_data->{url},
        title         => $title,
        user          => $user,
        video_url_map => $video_url_map,
        fmt           => $hq_data->{fmt},
        fmt_list      => $fmt_list,
        suffix        => $hq_data->{suffix},
        resolution    => $hq_data->{resolution},
    };
}

sub _mime_to_suffix {
    (my $mime = shift) =~ s{^([^;]+);.*}{$1};
    my $stype = MIME::Type->new(type => $mime)->subType;
    return $stype eq 'webm' ? 'webm'
         : $stype eq 'mp4'  ? 'mp4'
         : $stype eq '3gp'  ? '3gp'
         :                   'flv'
    ;
}

sub _decode_player_response {
  my ($self, $player_data) = @_;
  # need to decode $player_data->{streamingData}{formats};
  my $fmt_map = { map { $_->{mimeType} => join 'x', $_->{width}, $_->{height} } @{$player_data->{streamingData}{formats}} };
  my $fmt_url_map = { map { $_->{mimeType} => $_->{url} } @{$player_data->{streamingData}{formats}} };
  # more formats in $player_data->{streamingData}{adaptiveFormats};
  return +{
      map {
          $_->{fmt} => $_,
      } map +{
          fmt        => $_,
          resolution => $fmt_map->{$_},
          url        => $fmt_url_map->{$_},
          suffix     => _mime_to_suffix($_),
      }, keys %$fmt_map
  };
}

sub _fetch_title {
    my ($self, $content) = @_;

    my ($title) = $content =~ // or return;
    return decode_entities($title);
}

sub _fetch_user {
    my ($self, $content) = @_;

    if( $content =~ /

        return decode_entities($1);
    }elsif( $content =~ /","author":"([^"]+)","/ ){
        return decode_entities($1);
    }else{
        return;
    }
}

sub _fetch_video_url_map {
    my ($self, $content) = @_;

    my $args = $self->_get_args($content);
    unless ($args->{fmt_list} and $args->{url_encoded_fmt_stream_map}) {
        croak 'failed to find video urls';
    }

    my $fmt_map     = _parse_fmt_map($args->{fmt_list});
    my $fmt_url_map = _parse_stream_map($args->{url_encoded_fmt_stream_map});

    my $video_url_map = +{
        map {
            $_->{fmt} => $_,
        } map +{
            fmt        => $_,
            resolution => $fmt_map->{$_},
            url        => $fmt_url_map->{$_},
            suffix     => _suffix($_),
        }, keys %$fmt_map
    };

    return $video_url_map;
}

sub _get_content {
    my ($self, $video_id) = @_;

    my $url = "$base_url$video_id";

    my $req = HTTP::Request->new;
    $req->method('GET');
    $req->uri($url);
    $req->header('Accept-Language' => 'en-US');

    my $res = $self->ua->request($req);
    croak "GET $url failed. status: ", $res->status_line if $res->is_error;

    return $res->content;
}

sub _get_args {
    my ($self, $content) = @_;

    my $data;
    for my $line (split "\n", $content) {
        next unless $line;
        if ($line =~ /the uploader has not made this video available in your country/i) {
            croak 'Video not available in your country';
        }
        elsif ($line =~ /^.+ytplayer\.config\s*=\s*(\{.*})/) {
            ($data, undef) = JSON->new->utf8(1)->decode_prefix($1);
            last;
        }
    }

    croak 'failed to extract JSON data' unless $data->{args};

    return $data->{args};
}

sub _is_new {
    my ($self, $content) = @_;
    my $args = $self->_get_args($content);
    return 1 unless ($args->{fmt_list} and $args->{url_encoded_fmt_stream_map});
    return 0;
}

sub _parse_fmt_map {
    my $param = shift;
    my $fmt_map = {};
    for my $stuff (split ',', $param) {
        my ($fmt, $resolution) = split '/', $stuff;
        $fmt_map->{$fmt} = $resolution;
    }

    return $fmt_map;
}

sub _sigdecode {
    my @s = @_;

    # based on youtube_dl/extractor/youtube.py from yt-dl.org
    if (@s == 93) {
        return (reverse(@s[30..86]), $s[88], reverse(@s[6..28]));
    } elsif (@s == 92) {
        return ($s[25], @s[3..24], $s[0], @s[26..41], $s[79], @s[43..78], $s[91], @s[80..82]);
    } elsif (@s == 91) {
        return (reverse(@s[28..84]), $s[86], reverse(@s[6..26]));
    } elsif (@s == 90) {
        return ($s[25], @s[3..24], $s[2], @s[26..39], $s[77], @s[41..76], $s[89], @s[78..80]);
    } elsif (@s == 89) {
        return (reverse(@s[79..84]), $s[87], reverse(@s[61..77]), $s[0], reverse(@s[4..59]));
    } elsif (@s == 88) {
        return (@s[7..27], $s[87], @s[29..44], $s[55], @s[46..54], $s[2], @s[56..86], $s[28]);
    } elsif (@s == 87) {
        return (@s[6..26], $s[4], @s[28..38], $s[27], @s[40..58], $s[2], @s[60..86]);
    } elsif (@s == 86) {
        return (@s[4..30], $s[3], @s[32..84]);
    } elsif (@s == 85) {
        return (@s[3..10], $s[0], @s[12..54], $s[84], @s[56..83]);
    } elsif (@s == 84) {
        return (reverse(@s[71..78]), $s[14], reverse(@s[38..69]), $s[70], reverse(@s[15..36]), $s[80], reverse(@s[0..13]));
    } elsif (@s == 83) {
        return (reverse(@s[64..80]), $s[0], reverse(@s[1..62]), $s[63]);
    } elsif (@s == 82) {
        return (reverse(@s[38..80]), $s[7], reverse(@s[8..36]), $s[0], reverse(@s[1..6]), $s[37]);
    } elsif (@s == 81) {
        return ($s[56], reverse(@s[57..79]), $s[41], reverse(@s[42..55]), $s[80], reverse(@s[35..40]), $s[0], reverse(@s[30..33]), $s[34], reverse(@s[10..28]), $s[29], reverse(@s[1..8]), $s[9]);
    } elsif (@s == 80) {
        return (@s[1..18], $s[0], @s[20..67], $s[19], @s[69..79]);
    } elsif (@s == 79) {
        return ($s[54], reverse(@s[55..77]), $s[39], reverse(@s[40..53]), $s[78], reverse(@s[35..38]), $s[0], reverse(@s[30..33]), $s[34], reverse(@s[10..28]), $s[29], reverse(@s[1..8]), $s[9]);
    }

    return ();    # fail
}

sub _getsig {
    my $sig = shift;
    croak 'Unable to find signature' unless $sig;
    my @sig = _sigdecode(split(//, $sig));
    croak "Unable to decode signature $sig of length " . length($sig) unless @sig;
    return join('', @sig);
}

sub _parse_stream_map {
    my $param       = shift;
    my $fmt_url_map = {};
    for my $stuff (split ',', $param) {
        my $uri = URI->new;
        $uri->query($stuff);
        my $query = +{ $uri->query_form };
        my $sig = $query->{sig} || ($query->{s} ? _getsig($query->{s}) : undef);
        my $url = $query->{url};
        $fmt_url_map->{$query->{itag}} = $url . ($sig ? '&signature='.$sig : '');
    }

    return $fmt_url_map;
}

sub ua {
    my ($self, $ua) = @_;
    return $self->{ua} unless $ua;
    croak "Usage: $self->ua(\$LWP_LIKE_OBJECT)" unless eval { $ua->isa('LWP::UserAgent') };
    $self->{ua} = $ua;
}

sub _suffix {
    my $fmt = shift;
    return $fmt =~ /43|44|45|46/ ? 'webm'
         : $fmt =~ /18|22|37|38/ ? 'mp4'
         : $fmt =~ /13|17/       ? '3gp'
         :                         'flv'
    ;
}

sub video_id {
    my ($self, $stuff) = @_;
    return unless $stuff;
    if ($stuff =~ m{/.*?[?&;!](?:v|video_id)=([^&#?=/;]+)}) {
        return $1;
    }
    elsif ($stuff =~ m{/(?:e|v|embed)/([^&#?=/;]+)}) {
        return $1;
    }
    elsif ($stuff =~ m{#p/(?:u|search)/\d+/([^&?/]+)}) {
        return $1;
    }
    elsif ($stuff =~ m{youtu.be/([^&#?=/;]+)}) {
        return $1;
    }
    else {
        return $stuff;
    }
}

sub playlist_id {
    my ($self, $stuff) = @_;
    return unless $stuff;
    if ($stuff =~ m{/.*?[?&;!]list=([^&#?=/;]+)}) {
        return $1;
    }
    elsif ($stuff =~ m{^\s*([FP]L[\w\-]+)\s*$}) {
        return $1;
    }
    return $stuff;
}

sub user_id {
    my ($self, $stuff) = @_;
    return unless $stuff;
    if ($stuff =~ m{/user/([^&#?=/;]+)}) {
        return $1;
    }
    return $stuff;
}

sub playlist {
    my ( $self, $id, $args ) = @_;

    my $fetchCnt = 1;
    my $html     = $self->_fetch_playlist($id);

    my ( $videos, $nextUrl ) = $self->_find_playlist_videos($html);

    return $videos unless $nextUrl;
    return $videos if $args && $args->{limit} && $fetchCnt >= $args->{limit};

    while ($nextUrl) {
        $fetchCnt++;
        my $json = $self->_fetch_playlist_json($nextUrl);

        ( my $moreVideos, $nextUrl )
            = $self->_find_playlist_json_videos($json);

        push( @$videos, @$moreVideos );

        last unless $nextUrl;
        last if $args && $args->{limit} && $fetchCnt >= $args->{limit};
    }

    return $videos;
}

sub _fetch_playlist {
    my $self = shift;
    my $id   = shift;
    my $url  = 'https://www.youtube.com/playlist?list=' . $id;

    print 'Fetching playlist page ' . $url . ' ... ' if $self->{verbose};

    my $res = $self->ua->get($url);

    croak(    'Error: fetch_playlist failed for url:'
            . $url
            . ' status:'
            . $res->status_line )
        unless $res->is_success;

    print "ok \n" if $self->{verbose};

    return $res->decoded_content;
}

sub _find_playlist_videos {
    my $self = shift;
    my $html = shift;

    ## find JSON blob
    my $line;
    for ( split( "\n", $html ) ) {
        if ( $_ =~ /window\["ytInitialData"\]/ ) {
            $line = $_;
            last;
        }
    }

    die "Error: could not find YT JSON data!" unless $line;

    my $start = index( $line, '{' );
    my $end   = rindex( $line, '}' );
    my $json  = substr( $line, $start, $end - $start + 1 );

    my $ref = JSON()->new->utf8(0)->decode($json);

    ## drill into YT's data structure
    die "Error: YT JSON data not structed as expected!"
        unless $ref->{contents}
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}
        && ref( $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs} ) eq 'ARRAY'
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}
        && ref(
        $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]
            ->{tabRenderer}->{content}->{sectionListRenderer}->{contents} )
        eq 'ARRAY'
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]->{itemSectionRenderer}
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]->{itemSectionRenderer}->{contents}
        && ref(
        $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]->{itemSectionRenderer}->{contents} ) eq 'ARRAY'
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]->{itemSectionRenderer}->{contents}->[0]
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]->{itemSectionRenderer}->{contents}->[0]->{playlistVideoListRenderer}
        && $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]->{itemSectionRenderer}->{contents}->[0]->{playlistVideoListRenderer}->{contents}
        && ref(
        $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]->{itemSectionRenderer}->{contents}->[0]->{playlistVideoListRenderer}->{contents} ) eq 'ARRAY';

    my $playlistVideoListRenderer
        = $ref->{contents}->{twoColumnBrowseResultsRenderer}->{tabs}->[0]
        ->{tabRenderer}->{content}->{sectionListRenderer}->{contents}->[0]
        ->{itemSectionRenderer}->{contents}->[0]->{playlistVideoListRenderer};

    ## weed out videos
    my @videos;
    my $cnt = 0;
    for my $renderer ( @{ $playlistVideoListRenderer->{contents} } ) {
        $cnt++;
        my $video = $renderer->{playlistVideoRenderer};

        push(
            @videos,
            {
                id      => $video->{videoId},
                runtime => $video->{lengthSeconds},
                title   => ( $video->{title}->{simpleText} || 'undef' )
                ,    # encoded in Perl internal
            }
        );

        if ( $self->{verbose} ) {
            print " $cnt id:" . $video->{videoId};
            print " runtime:" . ( $video->{lengthSeconds} || 'undef' );
            print " title:"
                . Encode::encode_utf8( $video->{title}->{simpleText}
                    || 'undef' );
            print "\n";
        }
    }

    ## next page
    my $nextUrl;
    if (   $playlistVideoListRenderer->{continuations}
        && ref( $playlistVideoListRenderer->{continuations} ) eq 'ARRAY'
        && $playlistVideoListRenderer->{continuations}->[0]
        && $playlistVideoListRenderer->{continuations}->[0]->{nextContinuationData} ) {
        my $next = $playlistVideoListRenderer->{continuations}->[0]
            ->{nextContinuationData};
        my $continuation = $next->{continuation};
        my $ctoken       = $continuation;
        my $itct         = $next->{clickTrackingParams};

        if ( $self->{verbose} ) {
            print " next page continuation data:\n cont:"
                . $continuation . "\n";
            print " itct:" . $itct . "\n";
            print "\n";
        }

        $nextUrl
            = 'https://www.youtube.com/browse_ajax?ctoken='
            . $ctoken
            . '&continuation='
            . $continuation
            . '&itct='
            . $itct;
    }

    return ( \@videos, $nextUrl );
}

sub _fetch_playlist_json {
    my $self = shift;
    my $url = shift;

    print 'Fetching playlist next page '. $url .' ... ' if $self->{verbose};

    my $res = $self->ua->get($url,
    # thanks youtube-dl for the hint towards these headers
        'x-youtube-client-name' => '1',
        'x-youtube-client-version' => '2.20200825.04.00', # version '1.20200609.04.02' will return a HTML blob in content_html, this version returns only JSON
    );

    croak('Error: fetch_playlist_json failed for url:'. $url .' status:'. $res->status_line) unless $res->is_success;

    print "ok \n" if $self->{verbose};

    return $res->decoded_content;
}

sub _find_playlist_json_videos {
    my $self = shift;
    my $json = shift;

    my $ref = JSON()->new->utf8(1)->decode($json);

    ## drill into YT's data structure
    die "Error: YT JSON data not structed as expected!"
        unless ref($ref) eq 'ARRAY'
        && $ref->[1]
        && $ref->[1]->{response}
        && $ref->[1]->{response}->{continuationContents}
        && $ref->[1]->{response}->{continuationContents}->{playlistVideoListContinuation}
        && $ref->[1]->{response}->{continuationContents}->{playlistVideoListContinuation}->{contents}
        && ref( $ref->[1]->{response}->{continuationContents}->{playlistVideoListContinuation}->{contents} ) eq 'ARRAY';

    my $playlistVideoListContinuation
        = $ref->[1]->{response}->{continuationContents}
        ->{playlistVideoListContinuation};

    ## weed out videos
    my @videos;
    my $cnt = 0;
    for my $renderer ( @{ $playlistVideoListContinuation->{contents} } ) {
        $cnt++;
        my $video = $renderer->{playlistVideoRenderer};

        push(
            @videos,
            {
                id      => $video->{videoId},
                runtime => $video->{lengthSeconds},
                title   => ( $video->{title}->{simpleText} || 'undef' )
                ,    # encoded in Perl internal
            }
        );

        if ( $self->{verbose} ) {
            print " $cnt id:" . $video->{videoId};
            print " runtime:" . ( $video->{lengthSeconds} || 'undef' );
            print " title:"
                . Encode::encode_utf8( $video->{title}->{simpleText}
                    || 'undef' );
            print "\n";
        }
    }

    ## next page
    my $nextUrl;
    if (   $playlistVideoListContinuation->{continuations}
        && ref( $playlistVideoListContinuation->{continuations} ) eq 'ARRAY'
        && $playlistVideoListContinuation->{continuations}->[0]
        && $playlistVideoListContinuation->{continuations}->[0]->{nextContinuationData} ) {
        my $next = $playlistVideoListContinuation->{continuations}->[0]->{nextContinuationData};
        my $continuation = $next->{continuation};
        my $ctoken       = $continuation;
        my $itct         = $next->{clickTrackingParams};

        if ( $self->{verbose} ) {
            print " next page continuation data:\n cont:"
                . $continuation . "\n";
            print " itct:" . $itct . "\n";
            print "\n";
        }

        $nextUrl
            = 'https://www.youtube.com/browse_ajax?ctoken='
            . $ctoken
            . '&continuation='
            . $continuation
            . '&itct='
            . $itct;
    }

    return ( \@videos, $nextUrl );
}

1;

=pod

=encoding UTF-8

=head1 NAME

WWW::YouTube::Download - WWW::YouTube::Download - Very simple YouTube video download interface

=head1 VERSION

version 0.64

=head1 SYNOPSIS

  use WWW::YouTube::Download;

  my $client = WWW::YouTube::Download->new;
  $client->download($video_id);

  my $video_url = $client->get_video_url($video_id);
  my $title     = $client->get_title($video_id);     # maybe encoded utf8 string.
  my $fmt       = $client->get_fmt($video_id);       # maybe highest quality.
  my $suffix    = $client->get_suffix($video_id);    # maybe highest quality file suffix

=head1 DESCRIPTION

WWW::YouTube::Download is a library to download videos from YouTube. It relies entirely on
scraping a video's webpage and does not use YT's /get_video_info URL space.

=head1 METHODS

=over

=item B

  $client = WWW::YouTube::Download->new;

Creates a WWW::YouTube::Download instance.

=item B

  $client->download($video_id);
  $client->download($video_id, {
      fmt      => 37,
      filename => 'sample.mp4', # save file name
  });
  $client->download($video_id, {
      filename => '{title}.{suffix}', # maybe `video_title.mp4`
  });
  $client->download($video_id, {
      cb => \&callback,
  });

Download the video file.
The first parameter is passed to YouTube video url.

Allowed arguments:

=over

=item C

Set a callback subroutine, SEE L ':content_cb'
for details.

=item C

Set the filename, possibly using placeholders to be filled with
information gathered about the video.

C<< filename >> supported format placeholders:

  {video_id}
  {title}
  {user}
  {fmt}
  {suffix}
  {resolution}

Output filename is set to C<{video_id}.{suffix}> by default.

=item C

B<< DEPRECATED >> alternative for C.

=item C

set the format to download. Defaults to the best video quality
(inferred by the available resolutions).

=back

=item B

  $client->playback_url($video_id);
  $client->playback_url($video_id, { fmt => 37 });

Return playback URL of the video. This is direct link to the movie file.
Function supports only "fmt" option.

=item B

Gather data about the video. A hash reference is returned, with the following
keys:

=over

=item C

the default, suggested format. It is inferred by selecting the
alternative with the highest resolution.

=item C

the list of available formats, as an array reference.

=item C

the filename extension associated to the default format (see C
above).

=item C </td>
</tr>

<tr>
<td  class="h" >
<a name="822">822</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="823">823</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the title of the video </td>
</tr>

<tr>
<td  class="h" >
<a name="824">824</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="825">825</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item C<user> </td>
</tr>

<tr>
<td  class="h" >
<a name="826">826</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="827">827</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the YouTube user owning the video </td>
</tr>

<tr>
<td  class="h" >
<a name="828">828</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="829">829</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item C<video_id> </td>
</tr>

<tr>
<td  class="h" >
<a name="830">830</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="831">831</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the video identifier </td>
</tr>

<tr>
<td  class="h" >
<a name="832">832</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="833">833</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item C<video_url> </td>
</tr>

<tr>
<td  class="h" >
<a name="834">834</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="835">835</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the URL of the video associated to the default format (see C<fmt> </td>
</tr>

<tr>
<td  class="h" >
<a name="836">836</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> above). </td>
</tr>

<tr>
<td  class="h" >
<a name="837">837</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="838">838</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item C<video_url_map> </td>
</tr>

<tr>
<td  class="h" >
<a name="839">839</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="840">840</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> an hash reference containing details about all available formats. </td>
</tr>

<tr>
<td  class="h" >
<a name="841">841</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="842">842</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =back </td>
</tr>

<tr>
<td  class="h" >
<a name="843">843</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="844">844</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> The C<video_url_map> has one key/value pair for each available format, </td>
</tr>

<tr>
<td  class="h" >
<a name="845">845</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> where the key is the format identifier (can be used as C<fmt> parameter </td>
</tr>

<tr>
<td  class="h" >
<a name="846">846</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> for L</download>, for example) and the value is a hash reference with </td>
</tr>

<tr>
<td  class="h" >
<a name="847">847</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the following data: </td>
</tr>

<tr>
<td  class="h" >
<a name="848">848</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="849">849</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =over </td>
</tr>

<tr>
<td  class="h" >
<a name="850">850</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="851">851</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item C<fmt> </td>
</tr>

<tr>
<td  class="h" >
<a name="852">852</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="853">853</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the format specifier, that can be passed to L</download> </td>
</tr>

<tr>
<td  class="h" >
<a name="854">854</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="855">855</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item C<resolution> </td>
</tr>

<tr>
<td  class="h" >
<a name="856">856</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="857">857</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the resolution as I<width>xI<height> </td>
</tr>

<tr>
<td  class="h" >
<a name="858">858</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="859">859</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item C<suffix> </td>
</tr>

<tr>
<td  class="h" >
<a name="860">860</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="861">861</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the suffix, providing a hint about the video format (e.g. webm, flv, ...) </td>
</tr>

<tr>
<td  class="h" >
<a name="862">862</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="863">863</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item C<url> </td>
</tr>

<tr>
<td  class="h" >
<a name="864">864</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="865">865</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the URL where the video can be found </td>
</tr>

<tr>
<td  class="h" >
<a name="866">866</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="867">867</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =back </td>
</tr>

<tr>
<td  class="h" >
<a name="868">868</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="869">869</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<ua([$ua])> </td>
</tr>

<tr>
<td  class="h" >
<a name="870">870</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="871">871</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   $self->ua->agent(); </td>
</tr>

<tr>
<td  class="h" >
<a name="872">872</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   $self->ua($LWP_LIKE_OBJECT); </td>
</tr>

<tr>
<td  class="h" >
<a name="873">873</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="874">874</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> Sets and gets LWP::UserAgent object. </td>
</tr>

<tr>
<td  class="h" >
<a name="875">875</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="876">876</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<video_id($url)> </td>
</tr>

<tr>
<td  class="h" >
<a name="877">877</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="878">878</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> Parses given URL and returns video ID. </td>
</tr>

<tr>
<td  class="h" >
<a name="879">879</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="880">880</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<playlist_id($url)> </td>
</tr>

<tr>
<td  class="h" >
<a name="881">881</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="882">882</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> Parses given URL and returns playlist ID. </td>
</tr>

<tr>
<td  class="h" >
<a name="883">883</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="884">884</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<user_id($url)> </td>
</tr>

<tr>
<td  class="h" >
<a name="885">885</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="886">886</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> Parses given URL and returns YouTube username. </td>
</tr>

<tr>
<td  class="h" >
<a name="887">887</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="888">888</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<get_video_id($video_id)> </td>
</tr>

<tr>
<td  class="h" >
<a name="889">889</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="890">890</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<get_video_url($video_id)> </td>
</tr>

<tr>
<td  class="h" >
<a name="891">891</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="892">892</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<get_title($video_id)> </td>
</tr>

<tr>
<td  class="h" >
<a name="893">893</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="894">894</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<get_user($video_id)> </td>
</tr>

<tr>
<td  class="h" >
<a name="895">895</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="896">896</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<get_fmt($video_id)> </td>
</tr>

<tr>
<td  class="h" >
<a name="897">897</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="898">898</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<get_fmt_list($video_id)> </td>
</tr>

<tr>
<td  class="h" >
<a name="899">899</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="900">900</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<get_suffix($video_id)> </td>
</tr>

<tr>
<td  class="h" >
<a name="901">901</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="902">902</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =item B<playlist($id,$ref)> </td>
</tr>

<tr>
<td  class="h" >
<a name="903">903</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="904">904</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> Fetches a playlist and returns a ref to an array of hashes, where each hash </td>
</tr>

<tr>
<td  class="h" >
<a name="905">905</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> represents a video from the playlist with youtube id, runtime in seconds </td>
</tr>

<tr>
<td  class="h" >
<a name="906">906</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> and title. On playlists with many videos, the method iteratively downloads </td>
</tr>

<tr>
<td  class="h" >
<a name="907">907</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> pages until the playlist is complete. </td>
</tr>

<tr>
<td  class="h" >
<a name="908">908</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="909">909</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> Optionally accepts a second argument, a hashref of options. Currently, you </td>
</tr>

<tr>
<td  class="h" >
<a name="910">910</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> can pass a "limit" value to stop downloading of subsequent pages on larger </td>
</tr>

<tr>
<td  class="h" >
<a name="911">911</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> playlists after x-amount of fetches (a limit of fetches, not playlist items). </td>
</tr>

<tr>
<td  class="h" >
<a name="912">912</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> For example, pass 1 to only download the first page of videos from a playlist </td>
</tr>

<tr>
<td  class="h" >
<a name="913">913</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> in order to "skim" the "tip" of new videos in a playlist. YouTube currently </td>
</tr>

<tr>
<td  class="h" >
<a name="914">914</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> returns 100 videos at max per page. </td>
</tr>

<tr>
<td  class="h" >
<a name="915">915</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="916">916</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> This method is used by the I<youtube-playlists.pl> script. </td>
</tr>

<tr>
<td  class="h" >
<a name="917">917</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="918">918</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =back </td>
</tr>

<tr>
<td  class="h" >
<a name="919">919</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="920">920</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =head1 CONTRIBUTORS </td>
</tr>

<tr>
<td  class="h" >
<a name="921">921</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="922">922</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> yusukebe </td>
</tr>

<tr>
<td  class="h" >
<a name="923">923</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="924">924</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =head1 BUG REPORTING </td>
</tr>

<tr>
<td  class="h" >
<a name="925">925</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="926">926</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> Please use github issues: L<< https://github.com/xaicron/p5-www-youtube-download/issues >>. </td>
</tr>

<tr>
<td  class="h" >
<a name="927">927</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="928">928</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =head1 SEE ALSO </td>
</tr>

<tr>
<td  class="h" >
<a name="929">929</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="930">930</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> L<WWW::YouTube::Info> and L<WWW::YouTube::Info::Simple>. </td>
</tr>

<tr>
<td  class="h" >
<a name="931">931</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> L<WWW::NicoVideo::Download> </td>
</tr>

<tr>
<td  class="h" >
<a name="932">932</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> L<http://rg3.github.io/youtube-dl/> </td>
</tr>

<tr>
<td  class="h" >
<a name="933">933</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="934">934</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =head1 AUTHOR </td>
</tr>

<tr>
<td  class="h" >
<a name="935">935</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="936">936</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> xaicron <xaicron {@} cpan.org> </td>
</tr>

<tr>
<td  class="h" >
<a name="937">937</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="938">938</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =head1 COPYRIGHT AND LICENSE </td>
</tr>

<tr>
<td  class="h" >
<a name="939">939</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="940">940</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> This software is copyright (c) 2013 by Yuji Shimada. </td>
</tr>

<tr>
<td  class="h" >
<a name="941">941</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="942">942</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> This is free software; you can redistribute it and/or modify it under </td>
</tr>

<tr>
<td  class="h" >
<a name="943">943</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> the same terms as the Perl 5 programming language system itself. </td>
</tr>

<tr>
<td  class="h" >
<a name="944">944</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="945">945</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> =cut </td>
</tr>

<tr>
<td  class="h" >
<a name="946">946</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s">   </td>
</tr>

<tr>
<td  class="h" >
<a name="947">947</a>
</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td >

 

</td>

<td class="s"> __END__ </td>
</tr>

</table>

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