MacTV (no, not that Mac TV) is a videocast that features all sorts of interesting Mac videos. Previous editions have included the Hal 9000 ad (one of my favorites), the original iPod TV spot and a formerly press-only video of Steve introducing the white iBooks (including Reality Distortion Field).
This week they offer their first tutorial in collaboration with ScreenCastsOnline. It's a very thorough look at several methods for creating screen captures and working with the results. I imagine that many seasoned Mac users are already aware of most of the presented information, but you may still find it interesting, as I did.
All of the MacTV videos are presented in H.264, meaning QuickTime 7 is required. If you like what you see, you can subscribe to the videocast in iTunes 4.9.