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zomberi / AutoPlay Video AutoStopper

// ==UserScript==
// @name        AutoPlay Video AutoStopper
// @namespace   com.vsubhash.js.autoplay-video-auto-stopper
// @description Pauses auto-playing videos. Excludes YouTube (has its own autostopper script com.vsubhash.js.youtube-annoyances-remover); Supports Firefox-based browser up to Version 36. Newer versions should use a UserAgent (UA) spoofer add-on. YouTube loads a lighter version of the YouTube page for older browsers. This script will require the GreaseMonkey add-on to run the script inside a browser.
// @exclude			https://www.youtube.com/*
// @version     2019.02
// @copyright		2019, V. Subhash (www.vsubhash.com)
// @license			MIT
// @homepageURL https://gist.github.com/vsubhash
// @author			zomberi
// @grant       none
// ==/UserScript==

document.addEventListener("readystatechange", handle_DOMLoad, false);

function handle_DOMLoad() {
	console.log("VideoAutoStopper: Readystatechange.");
	if ((document.readyState == "interactive") || (document.readyState == "complete")) {
		console.log("VideoAutoStopper: Document iteractive/complete.");
		window.setTimeout(pauseAllVideos, 1*1000);
		window.setTimeout(pauseAllVideos, 5*1000);
		window.setTimeout(pauseAllVideos, 20*1000);
		window.setTimeout(pauseAllVideos, 30*1000);
	}
}


function pauseAllVideos() {
  console.log("VideoAutoStopper: Parsing video tags...");
  try {
    var arVideos = document.getElementsByTagName("video");
    for (var i = 0; i < arVideos.length; i++) {      
      arVideos[i].pause();
      console.log("VideoAutoStopper: Paused a video - " + (i+1));
      arVideos[i].muted = true; // custom controls may not update
      arVideos[i].removeAttribute("autoplay");
      arVideos[i].removeAttribute("loop");
      arVideos[i].setAttribute("preload", "none");
    }
  } catch(e) {
    console.error("VideoAutoStopper: Error - " + e);
  }
}