It's not a real demo though, in my opinion. If it was already in a car or used to power a lathe or something tangible, that to me is a prototype. Even a toy car is fine by me. In the video we can guess it's a prototype of a functioning motor. I guess. But let's be honest, there are prototypes for perpetual machines.

A prototype has to be real world functional. Doesn't have to be perfect or clean looking, sleek, etc. Just proves it can do a real world function. If it can't do anything useless yet, it's just a lab experiment or wishful thinking.