Okay, I think you need to sit down and think about this. Do you actually NEED a real-time video recording?, I think you could do very well with something called a photo-story. It is basically a sequence of images in which you can control the timing, set animations, AND narrate, which makes it distinct from a slideshow. If this serves your purpose, get Microsoft Photo Story 3. It's freeware and very user-friendly. It's available at
http://snipurl.com/e0cx.
To make screen-captures (stills), a freeware utility, Grabber2k, is available. You can easily set it to capture only certain areas of the screen, or at specific intervals, and more. I'm not sure where the link is, but you can do a Google search to find it easily.
Good luck!
