The problem I'd have with doing this is that it would be difficult to think of a price I would be happy with.

The customer sounds like the type who would use this video to nitpick everything.

------ On June 1st from 11:03-11:07 you spent your time on google searching for something called an API. I demand you deduct 4 minutes from my bill. ------

Then if you get tired of dealing with it he can trash your reputation and he has edited video to back it up. Let's face it, if someone has hundreds of hours of footage of your work, they can find problems.

The whole thing sounds like a nightmare that could easily spiral out of control.