Userscript with simple CSS that resizes Invidious video players to full-width

Invidious_full-width_video.user.js

// ==UserScript==
// @name      Invidious full-width video
// @author    jnaskali
// @copyright 2020, Juhani Naskali (www.naskali.fi)
// @license   MIT
// @version   1.0
// @namespace https://www.naskali.fi
// @downloadURL https://openuserjs.org/install/jnaskali/Invidious_full-width_video.user.js
// 
// @match     https://invidio.us/watch?v=*
// @match     https://invidious.*/watch?v=*
// @match     https://yewtu.be/watch?v=*
// @grant     none
// @run-at    document-start
// 
// @description Simple CSS that resizes Invidious video players to full-width.
// ==/UserScript==

var style = document.createElement('style');
style.innerHTML = `
  #player-container {
    margin: 0 -12% 12%;
  }
`;
document.head.appendChild(style);