Why even bother with a video, just accept you fucked up..
Anyone who takes pride in their work will have no problem showing it off and showing the proof of it.
If I was a master carver I would video every piece I do and upload that on youtube and get more clients that way.
To delay like this goes to show that he likely doesnt have the same pride I would in my work and keeping the evidence to prove your skills to show anyone on a whim.
The delay makes him look even more like a fool on top of the fact that he is keeping a customer's funds while misrepresenting himself as doing original/custom work multiple times on this forum.
The guy is at least a liar, a thief, and a hot head when it comes to confrontation.