A simple userscript to download YouTube videos in MAX QUALITY
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// ==UserScript==
// @name YouTube video downloader
// @icon https://raw.githubusercontent.com/madkarmaa/youtube-downloader/main/images/icon.png
// @namespace aGkgdGhlcmUgOik=
// @source https://github.com/madkarmaa/youtube-downloader
// @supportURL https://github.com/madkarmaa/youtube-downloader
// @version 1.3.0
// @description A simple userscript to download YouTube videos in MAX QUALITY
// @author mk_
// @match *://*.youtube.com/*
// @connect co.wuk.sh
// @connect raw.githubusercontent.com
// @grant GM_addStyle
// @grant GM.xmlHttpRequest
// @grant GM.xmlhttpRequest
// @run-at document-end
// ==/UserScript==
(async () => {
'use strict';
const randomNumber = Math.floor(Math.random() * Date.now());
function Cobalt(videoUrl, audioOnly = false) {
// Use Promise because GM.xmlHttpRequest is async and behaves differently with different userscript managers
return new Promise((resolve, reject) => {
// https://github.com/wukko/cobalt/blob/current/docs/api.md
GM.xmlHttpRequest({
method: 'POST',
url: 'https://co.wuk.sh/api/json',
headers: {
'Cache-Control': 'no-cache',
Accept: 'application/json',
'Content-Type': 'application/json',
},
data: JSON.stringify({
url: encodeURI(videoUrl), // video url
vQuality: 'max', // always max quality
filenamePattern: 'basic', // file name = video title
isAudioOnly: audioOnly,
disableMetadata: true, // privacy
}),
onload: (response) => {
const data = JSON.parse(response.responseText);
if (data?.url) resolve(data.url);
else reject(data);
},
onerror: (err) => reject(err),
});
});
}
// https://stackoverflow.com/a/61511955
function waitForElement(selector) {
return new Promise((resolve) => {
if (document.querySelector(selector)) return resolve(document.querySelector(selector));
const observer = new MutationObserver(() => {
if (document.querySelector(selector)) {
observer.disconnect();
resolve(document.querySelector(selector));
}
});
observer.observe(document.body, { childList: true, subtree: true });
});
}
function notify(title, message) {
const notificationContainer = document.createElement('div');
notificationContainer.id = `yt-downloader-notification-${randomNumber}`;
const titleElement = document.createElement('h3');
titleElement.textContent = title;
const messageElement = document.createElement('span');
messageElement.textContent = message;
const closeButton = document.createElement('button');
closeButton.innerHTML =
'<svg xmlns="http://www.w3.org/2000/svg" height="1.5rem" viewBox="0 0 384 512"><path d="M342.6 150.6c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0L192 210.7 86.6 105.4c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3L146.7 256 41.4 361.4c-12.5 12.5-12.5 32.8 0 45.3s32.8 12.5 45.3 0L192 301.3 297.4 406.6c12.5 12.5 32.8 12.5 45.3 0s12.5-32.8 0-45.3L237.3 256 342.6 150.6z"/></svg>';
closeButton.addEventListener('click', () => {
notificationContainer.remove();
});
notificationContainer.append(titleElement, messageElement, closeButton);
document.body.appendChild(notificationContainer);
}
// true if youtube, false if youtube music
const YOUTUBE_SERVICE = window.location.hostname.split('.')[0] !== 'music';
// wait for the button to copy to appear before continuing
const buttonToCopy = await waitForElement(
YOUTUBE_SERVICE
? 'div#player div.ytp-chrome-controls div.ytp-right-controls button[aria-label="Settings"]'
: '[slot="player-bar"] div.middle-controls div.middle-controls-buttons #like-button-renderer #button-shape-dislike button[aria-label="Dislike"]'
);
const downloadButton = document.createElement('button');
const buttonId = `yt-downloader-btn-${randomNumber}`;
downloadButton.id = buttonId;
downloadButton.title = 'Click to download as video\nRight click to download as audio';
downloadButton.innerHTML =
'<svg xmlns="http://www.w3.org/2000/svg" fill="currentColor" height="24" viewBox="0 0 24 24" width="24" focusable="false" style="pointer-events: none; display: block; width: 100%; height: 100%;"><path d="M17 18v1H6v-1h11zm-.5-6.6-.7-.7-3.8 3.7V4h-1v10.4l-3.8-3.8-.7.7 5 5 5-4.9z"></path></svg>';
downloadButton.classList = buttonToCopy.classList;
if (YOUTUBE_SERVICE) downloadButton.classList.add('ytp-hd-quality-badge');
downloadButton.classList.add(YOUTUBE_SERVICE ? 'YT' : 'YTM');
// normal click => download video
downloadButton.addEventListener('click', async () => {
if (!window.location.pathname.slice(1))
return notify('Hey!', 'The video/song player is not open, I cannot see the link to download!'); // do nothing if video is not focused
try {
window.open(await Cobalt(window.location.href), '_blank');
} catch (err) {
notify('An error occurred!', JSON.stringify(err));
}
});
// right click => download audio
downloadButton.addEventListener('contextmenu', async (e) => {
if (!window.location.pathname.slice(1))
return notify('Hey!', 'The video/song player is not open, I cannot see the link to download!'); // do nothing if video is not focused
e.preventDefault();
try {
window.open(await Cobalt(window.location.href, true), '_blank');
} catch (err) {
notify('An error occurred!', JSON.stringify(err));
}
return false;
});
GM_addStyle(`
#${buttonId}.YT > svg {
margin-top: 3px;
margin-bottom: -3px;
}
#${buttonId}:hover > svg {
fill: #f00;
}
#yt-downloader-notification-${randomNumber} {
background-color: #282828;
color: #fff;
border: 2px solid #fff;
border-radius: 8px;
position: fixed;
top: 0;
right: 0;
margin-top: 10px;
margin-right: 10px;
padding: 15px;
z-index: 999;
}
#yt-downloader-notification-${randomNumber} > h3 {
color: #f00;
font-size: 2.5rem;
}
#yt-downloader-notification-${randomNumber} > span {
font-style: italic;
font-size: 1.5rem;
}
#yt-downloader-notification-${randomNumber} > button {
position: absolute;
top: 0;
right: 0;
background: none;
border: none;
outline: none;
width: fit-content;
height: fit-content;
margin: 5px;
padding: 0;
}
#yt-downloader-notification-${randomNumber} > button > svg {
fill: #fff;
}
`);
const buttonsRow = await waitForElement(
YOUTUBE_SERVICE
? 'div#player div.ytp-chrome-controls div.ytp-right-controls'
: '[slot="player-bar"] div.middle-controls div.middle-controls-buttons'
);
if (!buttonsRow.contains(downloadButton)) buttonsRow.insertBefore(downloadButton, buttonsRow.firstChild);
})();