Get the youtube ID from a youtube URL

ytIdFromUrl.js

ytIdFromUrl = function(url) {
  if (url.indexOf('youtu.be/') !== -1) {
    var re = new RegExp('.+youtu\.be/([^?#]+)', 'gi');
    var array = re.exec(url);
    return array[1];
  } else {
    var re = new RegExp('.+watch\\?v=([^&#]+)', 'gi');
    var array = re.exec(url);
    return array[1];
  }
};