public object AddToPlaylistWithPosition(YoutubeUserPlaylist pl, int position)
        {
            PlaylistVideoAdd action = new PlaylistVideoAdd(position, Id, pl.Id);

            return action.Execute();
        }
        public object AddToPlaylist(YoutubePlaylist pl)
        {
            PlaylistVideoAdd action = new PlaylistVideoAdd(-1, Id, pl.Id);

            return action.Execute();
        }