Choose the default volume for YouTube videos!
// ==UserScript==
// @name Auto Set Youtube Volume
// @namespace YTVol
// @version 5
// @description Choose the default volume for YouTube videos!
// @author hacker09
// @match https://www.youtube.com/embed/*
// @match https://www.youtube.com/watch?v=*
// @icon https://www.youtube.com/s/desktop/03f86491/img/favicon.ico
// @run-at document-start
// @grant GM_getValue
// @grant GM_setValue
// ==/UserScript==
(function() {
'use strict';
if (GM_getValue('Default_Volume') === undefined) //If the Default_Volume wasn't set yet
{ //Starts the if condition
GM_setValue('Default_Volume', 20); //Save the Default YT Volume as 20%
} //Finishes the if condition
window.sessionStorage.setItem('yt-player-volume', '{"data":"{\\"volume\\":' + GM_getValue('Default_Volume') + ',\\"muted\\":false}","creation":' + new Date().valueOf() + '}'); //Set the Default YT Volume
})();