pastebin - collaborative debugging

// ==UserScript==
// @name           mplaytube
// @namespace      http://untitledfinale.wordpress.com
// @description    play youtube videos with mplayer
// @include        www.youtube.com/*
// ==/UserScript==

// YouTube URL: http://www.youtube.com/watch?v=[video_id]
// YouTube download link: http://youtube.com/get_video?video_id=[video_id]&t=[t_id]

var download_url = 'http://youtube.com/get_video?video_id=';

/*var checker = document.getElementById('watch-checker-div');
if(checker){
   checker.parentNode.removeChild(checker);
}*/

var player = document.getElementById('watch-player-div');
var i = player.innerHTML;
var t_id = i.match(/t=([^(\&|$)]*)/)[1];
var video_id = i.match(/video_id=([^(\&|$)]*)/)[1];
var video_url = download_url + video_id + '&t=' + t_id;
var player2 = document.getElementById('movie_player');
player.innerHTML = '<embed type="application/x-mplayer2" src="'+ video_url +'" width="'+player2.width+'" height="'+player2.height+'">';