For capturing videos, I have tried out various programs. It looks as if software solutions can not do this, it is too demanding for current CPUs. I do this using a hardware USB TV and video capturing device from Pinnacle, with two computers. The first one runs CeeBot, the video signal goes to an S-Video plug. The S-Video signal is digitalized in the second computer through the hardware device in MPEG2-format, DVD resolution, this is enough for a nice demo.

However, I realized that PowerPoint can not play MPEG-2 videos, at least not on most computers; everything gets stuck. I convert first to .avi using Ulead MediaStudio, and then to wmv using Windows Movie Maker, which PowerPoint can display.