If you're on a Mac, just download the video as usual and then use iSquint to convert the file to an mp4 file format.

If you're on Windows, after downloading the video with savetube, get Videora iPod Converter if you wish to get to see it on your iPod Video. If you want to see it on your PSP get PSP Video 9 .

Now you can watch YouTube videos and show your favorite ones to your friends!