How does one conclusively prove the validity of an overunity device on a video?

[Lancair-ES]

I think that it is very unlikely.  If in the unlikely event someone comes up with strong evidence  then it is only fair to objectively evaluate that evidence.

Sadly there are no calculators which knows the exact answer to X/0. So evidence would be hard to evaluate

[Paul-R]

to Lancair-ES: I looked at building the Lancair IV-P in the '90s. Beautiful fast plane, but >4000 hrs was too much.

I had a look at their web site. Very nice indeed.

Has anyone introduced them to the Bob Boyce 101 plate electrolyser for improving fuel consumption? There might be vibration issues. Or even an electric motor? (I guess batteries would be an unsurmountable problem although N. Tesla would have had that fixed in a jiffy).

[Lancair-ES]

to Lancair-ES: I looked at building the Lancair IV-P in the '90s. Beautiful fast plane, but >4000 hrs was too much.

It's better to keep the scale down then and reduce the building time to 4 hours :-)
They have the most beautiful airplanes I know of. Very slim, perfect lines, fast and reliable sports planes.