I have a couple of ideas how the video might be improved. My initial impression was that if a new user saw all the config options they might be overwhelmed. And a more experienced user probably wouldn't find the video useful because they'd be used to doing that kind of thing.
So . . . you might want to emphasize that the default options should be sufficient for someone with less experience. Reassuring the viewer that they can do this just by pressing enter etc. and refracta will do the job should give them the courage to actually try it. Then possibly add a section dealing in more detail with the config files for more savvy users. I think it would be a good idea to start from the default options and then discuss (and type in real time) which ones that might need changing and why. The xz thing stumped me a few posts back so more explanation might be helpful.
Finally, I don't know that your signoff wave is appropriate - I prefer 'personality neutral' presentations - but that decision would be up to fsmithred.