public List<PlaylistDto> GetUploadsPlaylist(IEnumerable<string> ids)
        {
            var playlists = new List<PlaylistDto>();

            foreach (var playlist in ids
                .Select(id => new PlaylistsQuery { Id = id })
                .Select(query => _playlistQueryHandler.GetUploadsPlaylist(query)))
            {
                playlists.AddPlaylists(new[] {playlist});
            }

            return playlists;
        }
        public List<PlaylistDto> GetPlaylists(IEnumerable<string> channelIds)
        {
            var playlists = new List<PlaylistDto>();

            foreach (var playlist in channelIds
                .Select(channelId => new PlaylistsQuery { Id = channelId })
                .Select(query => _playlistQueryHandler.GetAllPlaylists(query)))
            {
                playlists.AddPlaylists(playlist);
            }

            return playlists;
        }