detect youtube link in text and replace it with embed

function embedYoutubeLink(text){
  var regExp = /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*).*/;
  var match = text.match(regExp);
  if (match && match[2].length == 11) {
      return '<iframe src="https://www.youtube.com/embed/' + match[2] + '" frameborder="0" allowfullscreen></iframe>';
  } else {
      return text;
  }
}