for like 5 minutes of video, it will take up 20gb???
Five minutes is about 1 gig. However, as I said, I generally have between
6 and 10 times that much video that I edit down to end up with 5 minutes
of finished product. That turns out to be 6 gig to 10 gig. Along with the
final product quicktime file, along with the DVD image if I'm creating a
DVD, along with all the other stuff I mentioned before. It adds up.
If, of course, you are a much more efficient at recording, and you only
require 5 minutes of tape to produce a 5 minute video, more power to you!
Edit: And of course, quite a bit of this storage is just required temporarily.
You could always get rid of these files once you are done with your project.