apply_filters( 'wp_embed_handler_youtube', string $embed, array $attr, string $url, array $rawattr )

252	 *253	 * @param string $embed   YouTube embed output.254	 * @param array  $attr    An array of embed attributes.255	 * @param string $url     The original URL that was matched by the regex.256	 * @param array  $rawattr The original unmodified attributes.257	 */258	return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr );259}260 261/**262 * Audio embed handler callback.263 *264 * @since 3.6.0