I made a video showing 'how it works' after strong suggestion from the HN post: http://news.ycombinator.com/item?id=2924313
It's the first video I ever made, I'm pretty pleased with it!
http://www.youtube.com/watch?v=5RlSmkSbleI
Comments welcome! I know it could be a bit more polished but I think overall it works well and is better than no video.
So far the response has been great. People who knew I was working on this are suddenly far more interested, it seems to be the right medium to use.
I think it is good for the audience to hear a human voice, and hopefully you get to explain it a bit better.
Other than that, i think it's pretty good. I like the upbeat background music.