A simple userscript that clicks the continue watching button on YouTube. Other solutions were overcomplicated or used intervals

YouTube_Continue_Watching.user.js

// ==UserScript==
// @name        YouTube Continue Watching
// @description A simple userscript that clicks the continue watching button on YouTube. Other solutions were overcomplicated or used intervals
// @namespace   https://roon.dev
// @license     MIT
// @icon        https://upload.wikimedia.org/wikipedia/commons/thumb/0/09/YouTube_full-color_icon_%282017%29.svg/320px-YouTube_full-color_icon_%282017%29.svg.png
// @match       http*://www.youtube.com/watch*
// @grant       none
// @downloadURL https://gist.githubusercontent.com/lbrooney/9f80de4ebb491aaf35a47a195e264b29/raw/YouTube_Continue_Watching.user.js
// @updateURL   https://gist.githubusercontent.com/lbrooney/9f80de4ebb491aaf35a47a195e264b29/raw/YouTube_Continue_Watching.user.js
// @version     0.1.2
// @author      Liam Rooney | lbrooney
// ==/UserScript==

console.log('[YTCW] YouTube Continue Watching Started.');
// https://developers.google.com/youtube/iframe_api_reference
// for state and starting video
const observer = new MutationObserver(() => {
  const confirmButton = document.getElementById('confirm-button');
  const player = document.getElementById('movie_player');
  if (confirmButton && player.getPlayerState() === 2) { // if confirmButton exists(it should) and the video is paused(it should be)
    console.log(`[YTCW] Clicked yes to continue at ${(new Date()).toTimeString()}`);
    confirmButton.click();
    player.playVideo(); // ensure video plays, should when yes clicked, but this guarantees. Might be unnecessary
  }
});

observer.observe(
  document.getElementsByTagName('ytd-popup-container')[0], // observe popup(confirm button will be added as childNode)
  { attributes: true, childList: true, subtree: true },
);

found typo in line 15.
s/YouTUbe/YouTube/

Should be fixed, thanks!