detect youtube link in text and replace it with embed

function youtube_parser(url){
  var regExp = /^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#\&\?]*).*/;
  var match = url.match(regExp);
  return (match&&match[7].length==11)? match[7] : false;
}