Unstick the header from youtube & scroll the movie_player into view

unstick-youtube.user.js

// ==UserScript==
// @name         Unstick Youtube
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://*.youtube.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var i, elements = document.querySelectorAll('body *');

    setTimeout( function() {
        for (i = 0; i < elements.length; i++) {
            if (["sticky", "fixed"].includes(getComputedStyle(elements[i]).position)) {
                console.log("element found:", elements[i]);
                elements[i].setAttribute("style", "position: static");
            }
        }
    }, 5000);
    setTimeout( function(){
        document.getElementById("movie_player").scrollIntoView();
    }, 5100);
})();