external_id for youtube

PlayBot/sites/youtube.pm

@@ -114,6 +114,7 @@ sub get
     $infos{'author'} = $video->{'snippet'}->{'channelTitle'};
 	$infos{'site'} = 'youtube';
     $infos{'url'} = 'https://www.youtube.com/watch?v='.$id;
+    $infos{'external_id'} = $id;
 
 	return %infos;
 }