Don,
Here's a 10-minute clip - How to Film a Video - from Askthebuilder.com:
http://www.copywriting1.com/2007/12/...ilm-video.html
Also, if you're just shooting short clips at your desk and that sort of quality, you might want to consider something like the RCA Small Wonder EZ205 that I just picked up last week at Circuit City for $89 that records up to 2 hours, or 30 minutes for the higher DVD quality setting. You can also find last years EZ105 (60 minutes) around for $50-$60, or even the EZ101 (30 minutes) for around $30.
It's pretty amazing what you can get for the price and the way that Youtube breaks your files way down in size, the quality is gonna suffer no matter what type of camera you use.
I also register free accounts at Box.net to upload and store the files directly from my camera to their server. Then download the clips back into Windows Movie Maker as I need them.
Good luck,
Rod