youtube live stream timestamp

yt-live-timstamp.user.js

// ==UserScript==
// @name         youtube live timestamp
// @namespace    https://rooot.gay/
// @version      2025-06-10
// @description  adds a timestamp next to the LIVE indicator for streams
// @author       rooot
// @updateURL    https://gist.github.com/RoootTheFox/7e83ecba5074c3985f3a5572e0b5eb80/raw/49a0eff2f3098489b419844b31af0682c82a153a/yt-live-timstamp.user.js
// @downloadURL  https://gist.github.com/RoootTheFox/7e83ecba5074c3985f3a5572e0b5eb80/raw/49a0eff2f3098489b419844b31af0682c82a153a/yt-live-timstamp.user.js
// @match        https://www.youtube.com/watch?v=*
// @icon         https://www.youtube.com/s/desktop/d36f30a8/img/logos/favicon_144x144.png
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    let _injected = false;
    function tryInject() {
        let video = document.querySelector("video");
        if (video && !_injected) {
            console.log("INJECTING LIVE TIMESTAMP")
            _injected = true;
            document.querySelector("video").addEventListener("timeupdate", function(e) {
                let time = Math.round(e.target.currentTime);
                let d = new Date(null);
                d.setSeconds(Math.round(time));
                document.querySelector(".ytp-time-display>button.ytp-live-badge").innerHTML = `Live (${d.toISOString().slice(11, 19)})`;
            })
        }
        if (!video) _injected = false;
    }
    setInterval(tryInject, 1000);
    // Your code here...
})();