code: function injectVideoApi(url, callback) {
      if (utils.isNil(url)) {
          console.error('Inject videos api error');
          return;
      }
      let found = document.querySelectorAll('script[src="' + url + '"]')
      if (utils.isNil(found) || found.length == 0) {
          let script = document.createElement('script');
          script.type = 'text/javascript';
          script.src = url;
          script.onload = () => {
              if (utils.isFunction(callback)) callback();
          };
          document.body.appendChild(script);
          return false;
      }
      if (utils.isFunction(callback)) callback();
  }
docs: Inject videos api
  used for youtube, vimeo and jwplayer
  
  @param {string} url
  @param {function} callback