Retrieve Youtube Playlist ID

[sonichandni]

Hello,

This package is worked good for retrieve video details and play list video by channel id.
I want to get playlist id from the playlist URL.
I tried this way:

$string = 'http://www.youtube.com/watch?v=A7izsd5IXq8&playnext=1&list=PL6753173C0F0BE9ED';
$url = parse_url($string);
parse_str($url['query'],$q);
$list = $q['list'];
$video = Youtube::getPlaylistItemsByPlaylistId($list);

But it not worked.
It shows this error

:Error 404 The playlist identified with the requests playlistId parameter cannot be found. : playlistNotFound

If you know please help.

Thanks in advance!