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YouTube Web Tweaks ultimate edition

This script was based on YouTube Web Tweaks lite but converted into ultimate package (which includes stuff from the force rounded corners scripts)

// ==UserScript==
// @name         YouTube Web Tweaks ultimate edition
// @version      2025.09.28
// @description  This script was based on YouTube Web Tweaks lite but converted into ultimate package (which includes stuff from the force rounded corners scripts)
// @author       Joey_JTS
// @license MIT
// @match        *://www.youtube.com/*
// @match        *://www.youtube-nocookie.com/*
// @match        *://www.youtu.be/*
// @namespace    https://greasyfork.org/en/users/761382
// @icon         https://www.youtube.com/favicon.ico
// @unwrap
// @run-at       document-idle
// @unwrap
// @grant        none
// ==/UserScript==

// Enable strict mode to catch common coding mistakes
"use strict";

// Define the flags to assign to the EXPERIMENT_FLAGS object
const flagsToAssign = {
  // Standard tweaks (YT config editor + Disable animations)
  IS_TABLET: true,
  DISABLE_YT_IMG_DELAY_LOADING: true,
  polymer_verifiy_app_state: false,
  desktop_delay_player_resizing: false,
  web_animated_actions: false,
  web_animated_like: false,
  web_animated_like_lazy_load: false,
  render_unicode_emojis_as_small_images: true,
  smartimation_background: false,
  kevlar_refresh_on_theme_change: false,
  // Disable cinematics (aka ambient lighting)
  kevlar_measure_ambient_mode_idle: false,
  kevlar_watch_cinematics_invisible: false,
  web_cinematic_theater_mode: false,
  web_cinematic_fullscreen: false,
  enable_cinematic_blur_desktop_loading: false,
  kevlar_watch_cinematics: false,
  web_cinematic_masthead: false,
  web_watch_cinematics_preferred_reduced_motion_default_disabled: false
};

const updateFlags = () => {
  // Check if the EXPERIMENT_FLAGS object exists in the window.yt.config_ property chain
  const expFlags = window?.yt?.config_?.EXPERIMENT_FLAGS;

  // If EXPERIMENT_FLAGS is not found, exit the function
  if (!expFlags) return;

  // Assign the defined flags to the EXPERIMENT_FLAGS object
  Object.assign(expFlags, flagsToAssign);
};

// Create a MutationObserver that calls the updateFlags function when changes occur in the document's subtree
const mutationObserver = new MutationObserver(updateFlags);
mutationObserver.observe(document, { subtree: true, childList: true });

(function() {
let css = `
/* Remove all annoyances (including 'shorts' section) */
ytd-merch-shelf-renderer,
ytd-action-companion-ad-renderer,
ytd-display-ad-renderer,
ytd-video-masthead-ad-advertiser-info-renderer,
ytd-video-masthead-ad-primary-video-renderer,
ytd-in-feed-ad-layout-renderer,
ytd-ad-slot-renderer,
ytd-statement-banner-renderer,
ytd-banner-promo-renderer-background,
ytd-ad-slot-renderer,
ytd-in-feed-ad-layout-renderer,
.ytwPanelAdHeaderImageLockupViewModelHost,
ytd-ads-engagement-panel-content-renderer,
#content.ytd-ads-engagement-panel-content-renderer,
ytd-engagement-panel-section-list-renderer[target-id="engagement-panel-ads"],
ytd-rich-item-renderer:has(> #content > ytd-ad-slot-renderer),
.ytd-video-masthead-ad-v3-renderer,
div#root.style-scope.ytd-display-ad-renderer.yt-simple-endpoint,
div#sparkles-container.style-scope.ytd-promoted-sparkles-web-renderer,
div#main-container.style-scope.ytd-promoted-video-renderer,
div#player-ads.style-scope.ytd-watch-flexy,
#clarify-box,
yt-about-this-ad-renderer,
masthead-ad,
ad-slot-renderer,
yt-mealbar-promo-renderer,
statement-banner-style-type-compact,
ytm-promoted-sparkles-web-renderer,
tp-yt-iron-overlay-backdrop,
#masthead-ad,
#expandable-metadata,
.ytGridShelfViewModelHost,
.ytd-search ytd-shelf-renderer,
ytd-reel-shelf-renderer,
ytd-rich-section-renderer {
display: none !important
}

.style-scope[page-subtype='channels'] ytd-shelf-renderer,
.style-scope[page-subtype='channels'] ytm-shelf-renderer {
display: block !important
}

/* Watch page tweaks (including player tweaks) */
#comment-teaser,
teaser-carousel {
display: none !important
}

ytd-horizontal-card-list-renderer[modern-chapters][card-list-style=HORIZONTAL_CARD_LIST_STYLE_TYPE_ENGAGEMENT_PANEL_SECTION],
ytd-video-description-infocards-section-renderer.style-scope.ytd-structured-description-content-renderer > #header.ytd-video-description-infocards-section-renderer,
ytd-video-description-infocards-section-renderer.style-scope.ytd-structured-description-content-renderer > #action-buttons.ytd-video-description-infocards-section-renderer,
#social-links.ytd-video-description-infocards-section-renderer {
display: none !important
}

ytd-video-description-infocards-section-renderer.style-scope.ytd-structured-description-content-renderer {
border-top: 0 !important
}

#paid-comment-images,
#paid-comment-chip > .yt-pdg-comment-chip-renderer.style-scope,
#paid-comment-background {
display: none !important
}

#actions.ytd-watch-metadata {
min-width: auto !important
}

yt-button-view-model.ytd-menu-renderer .yt-spec-button-shape-next--size-m, ytd-download-button-renderer .yt-spec-button-shape-next--size-m,
.yt-spec-button-shape-next--size-m[aria-label="Promote"],
#loop-button > .yt-spec-button-shape-next--size-m {
margin-left: 8px !important
}

#flexible-item-buttons .ytd-menu-renderer,
#top-level-buttons-computed yt-button-view-model.ytd-menu-renderer,
ytd-button-renderer#loop-button {
margin-left: 0 !important
}

.yt-spec-button-shape-next--size-m[aria-label="Promote"],
#flexible-item-buttons [aria-label="Promote"] {
display: none !important
}

.yt-spec-button-shape-next--size-m[aria-label="Ask"],
#flexible-item-buttons [aria-label="Ask"] {
display: none !important
}

ytd-watch-metadata.ytd-watch-flexy {
padding-bottom: 36px !important
}

.html5-endscreen.ytp-player-content.videowall-endscreen.ytp-show-tiles {
display: none !important
}

#related ytd-compact-video-renderer,
ytd-compact-movie-renderer,
#related ytd-compact-playlist-renderer,
#related ytd-compact-radio-renderer,
#related yt-lockup-view-model,
#related ytd-channel-renderer,
ytd-watch-flexy ytd-reel-shelf-renderer,
ytd-watch-flexy ytd-rich-section-renderer,
#related ytd-continuation-item-renderer,
#related #continuations {
display: none !important
}

#related yt-lockup-view-model:nth-of-type(1),
#related yt-lockup-view-model:nth-of-type(2),
#related yt-lockup-view-model:nth-of-type(3),
#related yt-lockup-view-model:nth-of-type(4),
#related yt-lockup-view-model:nth-of-type(5),
#related yt-lockup-view-model:nth-of-type(6),
#secondary #related yt-lockup-view-model:nth-of-type(7),
#secondary #related yt-lockup-view-model:nth-of-type(8),
#secondary #related yt-lockup-view-model:nth-of-type(9) {
display: flex !important
}

.ytp-gradient-top, .ytp-gradient-bottom {
height: 61px !important;
padding: 0
}

.ytp-small-mode .ytp-gradient-bottom {
height: 54px !important
}

.ytp-big-mode .ytp-gradient-top, .ytp-big-mode .ytp-gradient-bottom {
height: 0 !important
}

.ytp-gradient-top {
background: linear-gradient(to bottom, #0009, #0000) !important
}

.ytp-gradient-bottom {
background: linear-gradient(to top, #0009, #0000) !important
}

.ytd-ghost-grid-renderer,
.info-skeleton,
.meta-skeleton,
#ghost-cards,
#ghost-comment-section,
#related-skeleton {
display: none !important
}

/* More tweaks */
ytm-mobile-topbar-renderer.frosted-glass,
ytm-pivot-bar-renderer.frosted-glass,
ytm-feed-filter-chip-bar-renderer.frosted-glass,
#background.ytd-masthead, #frosted-glass.ytd-app,
#left-arrow-button.ytd-feed-filter-chip-bar-renderer,
#right-arrow-button.ytd-feed-filter-chip-bar-renderer {
background: var(--yt-spec-base-background) !important;
backdrop-filter: none !important;
-webkit-backdrop-filter: none !important
}

#left-arrow.ytd-feed-filter-chip-bar-renderer:after {
background: linear-gradient(to right, var(--yt-spec-base-background) 20%, rgba(255, 255, 255, 0) 80%) !important
}

#right-arrow.ytd-feed-filter-chip-bar-renderer:before {
background: linear-gradient(to left, var(--yt-spec-base-background) 20%, rgba(255, 255, 255, 0) 80%) !important
}

ytd-button-renderer.ytd-feed-filter-chip-bar-renderer {
background: transparent !important
}

div#end.style-scope.ytd-masthead .yt-spec-icon-badge-shape--style-overlay.yt-spec-icon-badge-shape--type-cart-refresh .yt-spec-icon-badge-shape__badge {
color: #fff !important
}

#channel-header-links.style-scope.ytd-c4-tabbed-header-renderer,
.page-header-view-model-wiz__page-header-attribution,
.yt-page-header-view-model__page-header-attribution {
display: none !important
}

#chip-bar.style-scope.ytd-search-header-renderer,
[page-subtype="playlist"] ytd-feed-filter-chip-bar-renderer {
display: none !important
}

ytd-search-header-renderer .yt-spec-button-shape-next--size-m {
flex-direction: row-reverse
}

ytd-search-header-renderer .yt-spec-button-shape-next--size-m.yt-spec-button-shape-next--icon-trailing .yt-spec-button-shape-next__icon {
margin-left: -6px;
margin-right: 6px
}

[is-search] ytd-shelf-renderer.ytd-item-section-renderer:not(ytd-channel-renderer + ytd-shelf-renderer),
[is-search] ytd-horizontal-card-list-renderer.ytd-item-section-renderer:not(:first-child),
[is-search] ytd-exploratory-results-renderer.ytd-item-section-renderer {
display: none !important
}

ytd-guide-entry-renderer > a[href*="/channel/UCtFRv9O2AHqOZjjynzrv-xg"],
ytd-guide-entry-renderer > a[href*="/feed/courses_destination"],
ytd-guide-entry-renderer > a[href*="/channel/UCrpQ4p1Ql_hG8rKXIKM1MOQ"],
ytd-guide-entry-renderer > a[href*="/channel/UCkYQyvc_i9hXEo4xic9Hh2g"],
ytd-guide-entry-renderer > a[href*="/podcasts"],
ytd-guide-entry-renderer > a[href*="/feed/podcasts"] {
display: none !important
}

ytd-download-button-renderer,
ytd-guide-entry-renderer > a[href*="/feed/downloads"],
ytd-mini-guide-entry-renderer > a[href*="/feed/downloads"] {
display: none !important
}

#footer.style-scope.ytd-guide-renderer {
display: none !important
}

.yt-spec-icon-badge-shape--type-notification .yt-spec-icon-badge-shape__badge {
display: none !important
}`;
if (typeof GM_addStyle !== "undefined") {
  GM_addStyle(css);
} else {
  let styleNode = document.createElement("style");
  styleNode.appendChild(document.createTextNode(css));
  (document.querySelector("head") || document.documentElement).appendChild(styleNode);
}
})();

// Force h264-only codec and disables WebGL script codes
var mse = window.MediaSource;
if (mse){
  // Set up replacement for MediaSource type support function
  var nativeITS = mse.isTypeSupported.bind(mse);
  mse.isTypeSupported = ourITS(nativeITS);
}
// Here's the replacement
function ourITS(fallback){
  // type is a string (hopefully!) sent by the page
  return function (type) {
    if (type === undefined) return '';
    // We only reject VP9
    if (type.toLowerCase().indexOf('vp9') > -1) return '';
    if (type.toLowerCase().indexOf('vp09') > -1) return ''; // Added 12/20/2019
    // Let Firefox handle everything else
    return fallback(type);
  };
}
 
document.addEventListener("yt-page-data-updated", (e) => {
    if (e.detail.pageType == "watch") {
        updateBtns();
    }
});

// Force notifications to not disturb mode
// Save the original descriptor of document.title
const originalTitleDescriptor = Object.getOwnPropertyDescriptor(Document.prototype, 'title');

// Create a custom getter and setter
Object.defineProperty(document, 'title', {
  get: function() {
    return originalTitleDescriptor.get.call(this);
  },
  set: function(newValue) {
    // Remove the (#) with regex.
    const interceptedValue = newValue.replace(/^\(\d+\)\s?/, "");

    // Call the original setter
    originalTitleDescriptor.set.call(this, interceptedValue);
  }
});

(function() {
    'use strict';
    const style = document.createElement('style');
    style.type = 'text/css';
    style.innerText = '.yt-spec-icon-badge-shape--type-notification .yt-spec-icon-badge-shape__badge{display:none;}';
    document.head.appendChild(style);
})();