get id from url
@param  {string} url url
@return {string}     id
function getIdFromURL (url) {
  var id = url.replace(youtubeRegexp, '$1');

  if (id.includes(';')) {
    var pieces = id.split(';');

    if (pieces[1].includes('%')) {
      var uriComponent = decodeURIComponent(pieces[1]);
      id = ("http://youtube.com" + uriComponent).replace(youtubeRegexp, '$1');
    } else {
      id = pieces[0];
    }
  } else if (id.includes('#')) {
    id = id.split('#')[0];
  }

  return id
}