We've mentioned tools like Dragon for voice recording to speed up articles and ebooks, and various tools for automating SEM tasks, but apart from the Camtasia varients and upload services there don't seem to be a lot of video related tools around.
In case you don't already know, if you use Skype there are some cool ad-ons for recording things and one of my favourite extras (free) is called 'remotex'.
It lets you share your desktop with someone else via Skype.
So if you're looking to outsource tasks it's a cool way to show somehow how to do the things you would do yourself.
Combine that with Camtasia or similar and you have a quick show-once, record it and never waste your time showing anyone personally again system.
I'm sure you can think of other uses (I don't want to tell you everything) too.