replace youtube urls in string with embed

function youtubeEmbed($string){
  return preg_replace('@(https?://)?(www.)?(youtube|youtu|youtube-nocookie).(com|be)/(watch)?(.*?)(&)?(amp;)?v?=?([^\s&"]+)(\?list=([^\s&"]+))?(.*?)$@i', '<iframe width="560" height="315" src="//www.youtube.com/embed/$9" frameborder="0" allowfullscreen></iframe>', $string);
}
    
youtubeEmbed('https://www.youtube.com/watch?v=lO1tAeDt6wg&list=RDlO1tAeDt6wg');