Play YouTube videos ad-free using an iframe embed served from localhost
// ==UserScript==
// @name YouTube Localhost Ad-Free Player
// @namespace Violentmonkey Scripts
// @match *://www.youtube.com/*
// @version 1.3.1
// @author CyrilSLi
// @description Play YouTube videos ad-free using an iframe embed served from localhost
// @license MIT
// ==/UserScript==
const frameId = "userscriptLocalhostFrame";
const embedURL = "https://www.youtube-nocookie.com/embed/%v?playlist=%p&autoplay=1&start=%start&enablejsapi=1";
const frameSrc = "http://localhost:8823?url=";
const containerIds = ["#player-container-inner", "#full-bleed-container", ".ytdMiniplayerPlayerContainerHost"];
const runFreq = 200;
const urlParams = new URLSearchParams(window.location.search);
let firstRunResume = parseInt((urlParams.get("t") || urlParams.get("start"))?.replace("s", "")) || 0;
let resumeTime = firstRunResume, oldDataset = {};
let enabled = true;
window.addEventListener("message", (ev) => {
if (!ev.data) {
return;
}
const data = (typeof ev.data === 'string' || ev.data instanceof String) ? JSON.parse(ev.data) : ev.data;
if (data.event == "infoDelivery") {
resumeTime = Math.floor(data?.info?.currentTime || resumeTime);
const playlist = data?.info?.playlist;
if (playlist && playlist.length > 0) {
oldDataset.playlist = playlist.join(",");
const oldVideoId = oldDataset.videoId;
oldDataset.videoId = playlist[data?.info?.playlistIndex] || globalFrame.dataset.videoId;
if (oldVideoId && oldVideoId !== oldDataset.videoId) {
const params = new URLSearchParams(window.location.search);
params.set("v", oldDataset.videoId);
params.set("userscript_modified", "1");
window.history.pushState({}, "", window.location.pathname + "?" + params.toString());
}
if (playlist.length > 1) {
const title = document.querySelector("h1.ytd-watch-metadata").children[0];
if (title) {
title.textContent = data?.info?.videoData?.title || title.textContent;
}
const author = document.querySelector("#text.ytd-channel-name").children[0];
if (author) {
author.textContent = data?.info?.videoData?.author || author.textContent;
}
}
}
}
});
const onOffBtn = document.createElement("button");
onOffBtn.id = "userscriptOnOffBtn";
onOffBtn.classList = "yt-spec-button-shape-next yt-spec-button-shape-next--tonal yt-spec-button-shape-next--mono yt-spec-button-shape-next--size-m";
onOffBtn.style.cssText = "margin: 0px 8px; min-width: min-content; max-width: min-content;";
onOffBtn.textContent = "yt-iframe ON";
function run(container) {
const visible = container.offsetHeight > 0;
let frame;
if (!document.getElementById("userscriptOnOffBtn")) {
const ownerMetadata = document.querySelector("div#owner.ytd-watch-metadata");
ownerMetadata.style.marginRight = "0px";
ownerMetadata.appendChild(onOffBtn.cloneNode(true));
document.getElementById("userscriptOnOffBtn").addEventListener("click", () => {
enabled = !enabled;
document.getElementById("userscriptOnOffBtn").textContent = enabled ? "yt-iframe ON" : "yt-iframe OFF";
if (!enabled) {
[...document.getElementsByClassName(frameId)].forEach((el) => el.remove());
containerIds.forEach((id) => {
const container = document.querySelector(id);
if (container) {
[...container.children].forEach((el) => {
el.style.visibility = "";
})
}
});
}
});
}
[...container.children].forEach((el) => {
if (el.className === frameId) {
frame = el;
} else {
el.style.visibility = "hidden";
}
});
if (!visible) {
if (frame) {
if (!oldDataset) {
oldDataset = Object.assign({}, frame.dataset);
}
frame.remove();
}
return;
}
function updateSrc() {
frame.src = frameSrc + encodeURIComponent(embedURL
.replace("%v", frame.dataset.videoId)
.replace("%p", frame.dataset.playlist || frame.dataset.videoId)
.replace("%start", resumeTime)
);
}
function selectList() {
[...document.querySelector("#items.playlist-items").children].forEach((el) => {
try {
if (new URLSearchParams(el.getElementsByTagName("a")[0].search).get("v") === frame.dataset.videoId) {
el.setAttribute("selected", "true");
} else {
el.removeAttribute("selected");
}
} catch (e) {
// Error handling if needed
}
});
}
if (!frame) {
frame = document.createElement("iframe");
container.appendChild(frame);
frame.className = frameId;
frame.style.position = "absolute";
frame.style.inset = "0";
frame.style.width = "100%";
frame.style.height = "100%";
frame.style.border = "none";
frame.allow = "autoplay; fullscreen";
frame.allowFullscreen = true;
if (oldDataset.videoId) {
frame.dataset.videoId = oldDataset.videoId;
frame.dataset.playlist = oldDataset.playlist || oldDataset.videoId;
if (oldDataset.userscriptModified === "1") {
const params = new URLSearchParams(window.location.search);
if (params.get("list") && params.get("list") === oldDataset.listId) {
params.set("v", oldDataset.videoId);
window.history.pushState({}, "", window.location.pathname + "?" + params.toString());
selectList();
}
}
oldDataset = {};
updateSrc();
}
}
if (!container.classList.contains("ytdMiniplayerPlayerContainerHost")) {
const params = new URLSearchParams(window.location.search);
videoId = params.get("v");
if (!videoId) {
return;
} else if (videoId !== frame.dataset.videoId) {
if (oldDataset.videoId) {
if (params.get("userscript_modified") === "1" && params.get("list")) {
frame.dataset.videoId = oldDataset.videoId;
selectList();
return;
} else {
window.location.reload();
}
}
resumeTime = firstRunResume; // Switching videos, reset resume time
frame.dataset.videoId = videoId;
const playlistEl = document.querySelector("#items.playlist-items");
if (playlistEl && playlistEl.children.length > 0) {
const playlistIds = [];
[...playlistEl.children].forEach((el) => {
try {
playlistIds.push(new URLSearchParams(el.getElementsByTagName("a")[0].search).get("v"));
} catch (e) {
// Error handling if needed
}
});
frame.dataset.playlist = playlistIds.join(",");
} else {
frame.dataset.playlist = videoId;
}
updateSrc();
}
} else {
if (frame.dataset.playlist !== frame.dataset.videoId) {
oldDataset.userscriptModified = "1";
const params = new URLSearchParams(window.location.search);
oldDataset.listId = params.get("list");
}
const infoBar = document.getElementsByClassName("ytdMiniplayerInfoBarHost")[0];
if (!infoBar.getElementsByTagName("svg").length) {
const closeBtn = document.createElementNS("http://www.w3.org/2000/svg", "svg");
closeBtn.setAttribute("fill", "black");
closeBtn.setAttribute("viewBox", "0 0 24 16");
closeBtn.style = "aspect-ratio: 3 / 2; height: 50%; margin: auto; cursor: pointer;";
const path1 = document.createElementNS("http://www.w3.org/2000/svg", "path");
path1.setAttribute("d", "M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14m0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16");
const path2 = document.createElementNS("http://www.w3.org/2000/svg", "path");
path2.setAttribute("d", "M4.646 4.646a.5.5 0 0 1 .708 0L8 7.293l2.646-2.647a.5.5 0 0 1 .708.708L8.707 8l2.647 2.646a.5.5 0 0 1-.708.708L8 8.707l-2.646 2.647a.5.5 0 0 1-.708-.708L7.293 8 4.646 5.354a.5.5 0 0 1 0-.708");
closeBtn.appendChild(path1);
closeBtn.appendChild(path2);
closeBtn.addEventListener("click", () => document.getElementsByClassName("ytp-miniplayer-close-button")[0].click());
infoBar.getElementsByClassName("ytdMiniplayerInfoBarExpand")[0].remove();
infoBar.appendChild(closeBtn);
}
}
document.querySelectorAll("ytd-comment-thread-renderer a.yt-core-attributed-string__link:not([data-iframe-player])").forEach((el) => {
const linkParams = new URLSearchParams(new URL(el.href, window.location).search);
if (linkParams.get("v") === frame.dataset.videoId) {
const timestamp = parseInt(linkParams.get("t")?.replace("s", ""));
if (timestamp) {
el.addEventListener("click", (ev) => {
resumeTime = timestamp;
updateSrc();
});
}
}
el.dataset.iframePlayer = "true";
});
firstRunResume = 0;
}
var lastRan = 0;
const observer = new MutationObserver(() => {
if (!enabled || location.href.includes("/shorts/")) {
return;
}
document.getElementsByClassName("html5-main-video")[0]?.pause();
if (Date.now() - lastRan < runFreq) {
return;
}
lastRan = Date.now();
containerIds.forEach((id) => {
const container = document.querySelector(id);
if (container) {
run(container);
}
});
});
if (!window.location.pathname.includes("embed")) {
observer.observe(document.body, {
attributes: false,
childList: true,
characterData: false,
subtree: true
});
}