I made a new tiny bookmarklet to let you increase the speed of a YouTube video beyond 2x.
As always, just drag this link to the bookmark bar on your browser, then just start a YouTube video, once the video starts, click the bookmark, and enter how many “x” you want the video played at. I usually stick to 2.5 or possibly 3, it all depends on the video – but you do you!
The code is pretty simple and easily found online, but just in case that’s what you are looking for:
(function(){document.getElementsByTagName('video')[0].playbackRate = window.prompt('Please enter a new speed:');})();