Redirect to SSYoutube

// ==UserScript==
// @name        SSYoutube Redirect
// @namespace   http://www.semicolonsoftware.de
// @description Redirect unavailable youtube videos to ssyoutube.com
// @include     /^https?://(?:.*\.)?youtube.com\/watch\?v=.+$/
// @version     1.0.0
// @grant       none
// ==/UserScript==

var $notfound = document.getElementById('watch7-player-unavailable');

if($notfound) {

  var m = /youtube.com\/watch\?v=([^&]+)(?:&.*)?/.exec(document.URL);

  if(m) {
    var id = m[1];
    console.log(id);

    var $a = document.createElement('a');

    $a.innerHTML = "Try on savefrom.net";
    $a.setAttribute('href', 'http://ssyoutube.com/watch?v=' + id);
    $a.setAttribute('style', 'position: absolute; bottom: 10px; right: 10px; font-size: 12pt; padding: 10px; background-color: #5BB75B; background-image: linear-gradient(to bottom, #62C462, #51A351); color: #FFF; text-decoration: none; border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25); border-radius: 4px;');


    $notfound.appendChild($a);
  }

}