LASidebarClose.user.js

// ==UserScript==
// @name         LASidebarClose
// @namespace    http://tampermonkey.net/
// @version      0.11
// @description  try to take over the world!
// @author       roylez
// @match        https://linuxacademy.com/cp/courses/lesson/course/*/lesson/*
// @updateURL    https://gist.github.com/4b2179d2b44a6f82705d927f16f75fe1/raw/LASidebarClose.user.js
// @downloadURL  https://gist.github.com/4b2179d2b44a6f82705d927f16f75fe1/raw/LASidebarClose.user.js
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    $(".video-sidebar").addClass("invisible minimize")
})();