Greasy Fork

It is kind of flaky for me, works only sometimes. There seems to be a race condition because it works much better if I delay wrap the function evaluation, with e.g.

(function() {
  'use strict';
  setTimeout(() => {  // Added this line

  // ....

  }, 4000);           // Added this line
})();

I barely use YouTube nowadays so I have no idea how this script performs. You're right about the race condition. I've made an update with your solution and I've also changed the directive which tells the browser after what event the script should be launched. This should be more stable than relying only on a random 4 seconds delay

Thanks, it works great now!