// ==UserScript==
// @name        Youtube: Remove Overlays
// @namespace   https://greasyfork.org/en/users/221281-klaufir
// @match       https://www.youtube.com/embed/*
// @match       https://www.youtube.com/watch?v=*
// @grant       none
// @version     1.6
// @author      -
// @description 10/30/2021, 12:35:27 AM
// @downloadURL none
// ==/UserScript==

function idle_waiter(wait_for_idle_ms, on_idle_callback) {
  // source: https://stackoverflow.com/a/47406751
  var action = function(o) {
      o.disconnect();
      on_idle_callback();
  }
    
  var resetTimer = function(changes, observer) {
      clearTimeout(timer);
      timer = setTimeout(action, wait_for_idle_ms, observer);
  }
  
  var observer = new MutationObserver(resetTimer);
  var timer = setTimeout(action, wait_for_idle_ms, observer); // wait for the page to stay still for 3 seconds
  observer.observe(document, {childList: true, subtree: true});
}

function removeAllByClass(classes) {
  classes.forEach(cls => {
    Array.from(document.getElementsByClassName(cls)).map(e => e.remove());
  });
}

function cleanupOverlays() {
  const classes = [
        'ytp-paid-content-overlay',  // paid promotion notification overlay in the bottom left corner
        'ytp-pause-overlay',         // "More Videos" overlay on paused embeds
        'ytp-ce-element',            // covering overlays at the end of the video
        'iv-branding',               // branding overlay in the bottom right corner
        'ytp-cards-teaser',          // info cards in the top right corner
        'ytp-cards-button-icon',     // info cards in the top right corner
        'ytp-cards-button-title'
      ];
  removeAllByClass(classes);
}

// overkill but works
idle_waiter(100, cleanupOverlays);
idle_waiter(500, cleanupOverlays);
idle_waiter(1000, cleanupOverlays);