Classic youtube layout script

(function(){
    'use strict';
// ==/UserScript==
var url = window.location.href;
if (url.indexOf("disable_polymer") === -1) {
  if (url.indexOf("?") > 0) {
 url += "&";
  } else {
 url += "?";
  }
  url += "disable_polymer=1";
  window.location.href = url;
 document.cookie = document.cookie.split(' ').filter(o=>o.indexOf('PREF=')!==-1)[0].replace(';','')+'&f5=30030&f6=8;domain=.youtube.com;path=/';
}
})();