set youtube player theater mode when open video
// ==UserScript== // @name Theater player default in youtube // @namespace https://greasyfork.org/users/821661 // @match https://www.youtube.com/* // @grant none // @run-at document-body // @version 1.3 // @author hdyzen // @description set youtube player theater mode when open video // @license MIT // ==/UserScript== 'use strict'; window.ytcfg.data_.START_IN_THEATER_MODE = true;