Greasy Fork is available in English.
The YouTube mp3 Conv generates a Download on YouTube.com. Convert YouTube to mp3 and download the file to your device.
// ==UserScript==
// @name YouTube mp3 Conv
// @namespace https://www.rcyoutube.com/
// @author Addon Developer
// @license MIT
// @version 2.0
// @icon https://www.rcyoutube.com/userscript/icon.png
// @description The YouTube mp3 Conv generates a Download on YouTube.com. Convert YouTube to mp3 and download the file to your device.
// @match http://www.youtube.com/*
// @match https://www.youtube.com/*
// @grant none
// ==/UserScript==
(function() {
const div = document.createElement('div');
div.innerHTML = 'Download';
div.style.backgroundColor = '#ff0000';
div.style.color = '#ffffff';
div.style.border = 'none';
div.style.borderRadius = '5px';
div.style.padding = '4px 8px';
div.style.fontSize = '14px';
div.style.height = '20px';
div.style.width = '70px';
div.style.zIndex = '9999';
div.style.position = 'fixed';
div.style.top = '15px';
div.style.left = '190px';
div.style.cursor = 'pointer';
div.style.display = 'flex';
div.style.justifyContent = 'center';
div.style.alignItems = 'center';
div.onclick = function() {
window.open("https://www.rcyoutube.com/convert?v=" + window.location.href, '_blank');
}
document.body.appendChild(div);
})();