ScreenCasts or Screen Steps?

Here’s a documentation question for the list.

We’ve done well with some video screencasts on YouTube. I do think we
should continue with these – it’s great to have audio and video
narration.

I just saw a program for the Mac which creates some nice
documentation. I doubt we need to use the program, but the idea
looks pretty cool:

http://screensteps.com/examples/individual_lesson/Creating_a_Lesson.html

What do you think? Is this a good idea for the documentation?
-Geoff