Greasy Fork is available in English.

YouTube Remove Thin icons

Edits yt.config_

// ==UserScript==
// @name         YouTube Remove Thin icons
// @namespace    goodtube.github.io
// @version      0.4
// @description  Edits yt.config_
// @author       GoodTube
// @match        *://*.youtube.com/*
// @icon         https://www.youtube.com/favicon.ico
// @run-at document-start
// @grant        none
// ==/UserScript==

// i swear if youtube changes functions every day i might as well just put both of them into the script 
(function() {
    window['yt'] = window['yt'] || {};
    yt['config_'] = yt.config_ || {};
    yt.config_['EXPERIMENT_FLAGS'] = yt.config_.EXPERIMENT_FLAGS || {};

    var iv = setInterval(function() {
        yt.config_.EXPERIMENT_FLAGS.kevlar_updated_logo_icons = false;
        yt.config_.EXPERIMENT_FLAGS.kevlar_updated_icons = false;
        yt.config_.EXPERIMENT_FLAGS.kevlar_system_icons = false;
        yt.config_.EXPERIMENT_FLAGS.kevlar_watch_color_update = false;
        yt.config_.EXPERIMENT_FLAGS.desktop_mic_background = false;
    }, 1);

    var to = setTimeout(function() {
        clearInterval(iv);
    }, 1000)
})();
document.getElementsByTagName("html")[0].removeAttribute("system-icons");

// Credits to diyamund and daylin for the functions and <<John>> for digging up the flags. All of them are on Goodtube.
// P.S: Go check out r/oldyoutubelayout! :P