Enhancer for YouTube can do that, but you can also do it with simple userscript. The userscript I found somewhere few years ago: // ==UserScript== // @name

Enhancer for YouTube can do that, but you can also do it with simple userscript. The userscript I found somewhere few years ago: // ==UserScript== // @name Mediabord // @version 01.1 // @description tryd to take over the world! // @author j // @match *://*/* // @grant metadata // ==/UserScript== document.addEventListener('keydown', function(event) { var vidz = document.querySelectorAll('video'); function is_text_box(element){ var tagName = element.tagName.toLowerCase(); return tagName === "textarea" || tagName === "input";} if(is_text_box(event.target)) return false; vidz.forEach(vidz => { switch (event.keyCode) { case 221: // (]) vidz.playbackRate+=0.25; break; case 219: // ([) vidz.playbackRate-=0.25; break; case 220: // (\) vidz.playbackRate = 1; break; case 83: vidz.currentTime+=3; break; case 65: vidz.currentTime-= 3; break; } }); });