Old YouTube layout userscript

oldyoutube.user.js

// ==UserScript==
// @name         Old YouTube view pages
// @version      1.0
// @description  Brings back centered YouTube videos and removes guide and crew. 
// @include      http*://www.youtube.com/watch?*
// ==/UserScript==

(function() {
	document.getElementsByTagName('body')[0].className = document.getElementsByTagName('body')[0].className.replace(/(?:^|\s)site-left-aligned(?!\S)/g , '');
	document.getElementById('guide-container').parentNode.removeChild(document.getElementById('guide-container'));
})();