I have found a great new web site http://www.catch-video.com that enables
you to download and save YouTube videos onto your computer.
You can download to a number of different video and audio formats including
.avi, .mov, .dvd, .mp4, .3gp, .mp3, .wav and .flv.
The service has no annoying adverts and is quick and easy to use.
The Catch-Video service is also FREE.