public function youtube($link, $width=480, $height=360) {
		$url = parse_url($link);
		if (!array_key_exists('query', $url)) {
			return "";
		}
		parse_str($url['query'], $query);
		$is_playlist = array_key_exists('list', $query);
		if ($is_playlist) {
			$playlist_id = $query['list'];
			$embed_url = "//www.youtube.com/embed?listType=playlist&list=$playlist_id";
		} else {
			$video_id = $query['v'];
			$embed_url = "//www.youtube.com/embed/$video_id";
		}

		return "<iframe width=\"$width\" height=\"$height\" src=\"$embed_url\" frameborder=\"0\" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>";
	}