tampermonkey_youtube_timestamp.js

tampermonkey_youtube_timestamp.js

// ==UserScript==
// @name         YouTube add timestamped link
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Automatically update link with timestamp that you may later use for bookmarking
// @author       mwicat
// @match        *://www.youtube.com/watch*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    setTimeout(function () {
        var ytplayer = document.getElementById("movie_player");
        var link = document.createElement('a');

        var updateLink = function() {
            var tmTotalSeconds = Math.round(ytplayer.getCurrentTime());
            var tmMinutes = Math.floor(tmTotalSeconds / 60);
            var tmSeconds = tmTotalSeconds - tmMinutes * 60;
            var tmString = ' - ' + tmMinutes.toString() + 'm' + tmSeconds.toString().padStart(2, '0') + 's';
            link.text = ytplayer.getVideoData().title + tmString;
            var url = ytplayer.getVideoUrl() + '&t=' + tmTotalSeconds;
            link.href = url;
        };

        var contents = document.getElementById('start');
        contents.append(link);
        setInterval(updateLink, 1000);
    }, 1000);
})();