Convert Youtube video to MP3 using ThatMP3.com

Youtube-mp3-converter.user.js

// ==UserScript==
// @name        Youtube MP3 Converter
// @namespace   www.thatmp3.com
// @description Convert YouTube to MP3 with album art & ID3 tags automatically fixed!
// @include     https://www.youtube.com/*v=*
// @version     0.1
// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// @require     https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant       unsafeWindow
// ==/UserScript==
this.$ = this.jQuery = jQuery.noConflict(true);
$(function(){
  var eappend = ".watch-secondary-actions.yt-uix-button-group";
  function runMe(e){
    var ytID = new RegExp("v=([^&]+)", "i").exec(window.location.search);
    var link = "http://www.thatmp3.com/download="+unescape(ytID[1]);
    var res = '<div class="yt-uix-menu yt-uix-videoactionmenu "><a href="'+link+'" target="_blank" class="yt-uix-button yt-uix-button-size-default yt-uix-button-opacity yt-uix-button-has-icon no-icon-markup yt-uix-videoactionmenu-button addto-button pause-resume-autoplay yt-uix-menu-trigger yt-uix-tooltip">Download</a></div>';
    $(e).prepend(res);
  }
  waitForKeyElements(eappend,runMe);
});