automatically change video speed
// ==UserScript==
// @name Youtube AutoSpeed
// @namespace https://hrry.xyz
// @version 0.1
// @description automatically change video speed
// @author bluescorpian
// @match https://www.youtube.com/**
// @icon https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant none
// @license MIT
// ==/UserScript==
const DEFAULT_SPEED = 2;
(function() {
'use strict';
const video = document.querySelector('.html5-main-video');
if (video) video.playbackRate = DEFAULT_SPEED;
})();