Try Ekho on Youtube

EkhoYoutube.js

/** Precorded commands include
 *
 * 1. sidebar - toggle the sidebar on Youtube
 */
 
// Copy and paste the following code into web console on https://youtube.com
var script= document.createElement('script');
script.type= 'text/javascript';
script.src= 'https://ekhoapp.herokuapp.com/embed/bootstrap.js?containerId=masthead-positioner&activated=true&defaultProfile=__default';
document.head.appendChild(script);