Bookmarklet to show video controls on a web page

showvideocontrols.js

//bookmarklet_title: Show Video Controls
//bookmarklet_about: Drew Gottlieb

document.querySelectorAll('video').forEach(video => video.controls = true);

new MutationObserver(mutations => {
  mutations.forEach(mutation => {
    mutation.addedNodes.forEach(node => {
      if (node.tagName === 'VIDEO') node.controls = true;
    });
  });
}).observe(document.body, { childList: true, subtree: true });