KeepHD is a sweet tool that lets you download HD videos off Youtube! Not only can you download HD copies of your movies, you can also download the mobile 3GP version for your mobile devices plus the standard MP4 and FLV format. Just enter your Youtube video URL below, and KeepHD will automatically grab each version of the video you want to download.

Enter Youtube URL

Direct downloader, Its Simple
Whenever your watching a video on Youtube, just replace Youtube with KeepHD and it will automatically download the video!

For Example:
Just change http://www.Youtube.com/watch?v=wgS0KgT5APc
to
http://www.KeepHD.com/watch?v=wgS0KgT5APc