New userscript: Allow playing videos in background (#1517 #1523)

build/userscripts/Allow-playing-videos-in-background.js

@@ -0,0 +1,25 @@
+// ==UserScript==
+// @name         Allow playing videos in background
+// @version      1.0.0
+// @description  Allow playing youtube and vimeo videos in background in cromite. Original Javascript code by timdream and csagan5
+// @author       uazo
+// @match        https://*.youtube.com/*
+// @match        https://*.youtube-nocookie.com/*
+// @match        https://*.vimeo.com/*
+// @grant        none
+// @run-at       document-start
+// ==/UserScript==
+
+(function() {
+    'use strict';
+
+    window.addEventListener(
+        'visibilitychange', evt => evt.stopImmediatePropagation(), true);
+
+    // Fullscreen API
+    const IS_VIMEO = window.location.hostname.search(/(?:^|.+\\.)vimeo.com/) > -1;
+    if (IS_VIMEO) {
+        window.addEventListener(
+            'fullscreenchange', evt => evt.stopImmediatePropagation(), true);
+    }
+})();