WordPress Change oEmbed of youtube.com Links automatically to youtube-nocookie.com to fulfill the new EU-GDPR

youtube.php

// Add this to your plugin or functions.php file of your theme
// Source: https://gdgts.de/wordpress-youtube-embed/

function youtube_add_nocookie( $cached_html, $url, $attr, $post_id ) {
    if ( preg_match('#https?://(www\.)?youtu#i', $url) ) {
		return preg_replace(
			'#src=(["\'])(https?:)?//(www\.)?youtube\.com#i',
			'src=$1$2//$3youtube-nocookie.com',
			$cached_html
		);
	}
	return $cached_html;
}

add_filter( 'embed_oembed_html', 'youtube_add_nocookie', 99, 4 );