I thought it would be a simple job. Record a video of me using my Air Hockey program to demonstrate its features. I have spent some time writing a script and recording and editing it in AudaCity. I have generated a number of ogg/vorbis/theora (not sure which is the right term) video files using recordMyDesktop showing the software running, and so all I needed to do was pick video sequencing editor to put them all together and I would be done.
Easy, or so I thought. Wrong!!!