Download YouTube Movie to you phone

Today i was browsing on net and found something interesting, i found that you can download movie from youtube to your phone with youtube stock. i guess someone was modified this youtube apk and it added download button. This apk will save youtube movie to your sd card download folder and it will become *.mp4 extension.
ScreenShot :

 
Disadvantage :
1. Download progress cannot be cancelled
2. Must be renamed after download finish, cause not give download name. the name just .mp4
 
Requirement :
1. Your Phone must be rooted, if you don't know how to root or your phone unroot view this tutorial
2. Your phone must be have root explorer installed, install root explorer if your phone don't have it.

How To :
1. Open your root explorer, go to System/App copy or move or cut your YouTube.apk and place it in a save place, me at my computer.
2. Move com.android.youtube.apk to your sdcard
3. Install it and Get ready to download videos with your Stock Youtube
4. This make your YouTube can be uninstalled.

NOTE
THIS TUTORIAL ALREADY TESTED ON MY DEVICE GT-S5660 AND WORK PERFECTLY, SO IF YOUR NOT WORKING DON'T BLAME ME. WARNING ROOT EXPLORER CAN ERASE YOUR IMPORTANT FILE SO USE IT WISELY.