Harry Brignull has put together a comparison of software-based usability video labs
Morae and VisualMark are part of a new breed of software-based Usability Video labs, that run on your plain vanilla PC or Mac. What makes them special is that you don’t have to buy any new hardware, you just install the software, grab your webcams and other bits of kit off the shelf and off you go. Also, if running on a laptop, you are highly mobile and can carry the lab around in a bag that wont break your back. Plus you never have to look at another tape, scan converter, or sit around digitising content ever again.
(via City of Bits)