what is a screencast review?

It's like a video of a computer screen, usually narrated... this example should explain it:
http://demogirl.com/2007/06/26/fluthercom-makes-qa-cute/

that was a pretty sweet little screencast. i'm thinking you should add it under news, yo. don't you think? it'd be a helpful way for new fluther-ers to get an idea of how it works, eh?

Evan's right! It would be a good addition.