"[Dave] is only after money."I couldn't watch any further than that, because I instantly recognize the kind of mild psychosis underneath. The kind that latches on the first perceived fault (here, probably that Dave likes good, expensive tools like good 'scopes from Keysight and Siglent, and likes to point out fake products and crowdsourcing campaigns) – emphasis on
perceived –, and ignores everything else, because thinking critically and observing the world the way it is is hard and believing in a magical world is easier and comforting.
Disagreeing with Dave or anyone else on some things is fine, but completely ignoring the massive amount of useful and very helpful, completely free information on both Youtube and on this forum he's providing, is just .. sad, really. Ignoring all that evidence to cast doubt on Dave's motives is just irrational; strange, weird.
I do find it funny that these secretive inventors are so keen on keeping their inventions secret even when they cannot really even construct an cohesive argument why they need to do so. Usually, it is some drivel about "big companies stealing the invention and keeping it from the public", when just publishing the invention on the 'net would ensure that cannot happen. In reality, they think they are standing on a goldmine, and everyone who is criticizing their invention is trying to steal it from them – that too is part of the mild psychosis. In the real world, ideas are a dime a dozen, and the real world implementation is the one thing that matters.
I am not being mean to the "free energist" here, by they way. I'm using
psychosis in its clinical sense, as a medical condition. These people are very distinct from the charlatans trying to make money off fake products, and the "inventors" who genuinely believe their work will work because they really do not understand physics at all (and who are genuinely surprised they don't work if they build it). The best response to these, I think, is to gently tell them that not everybody is trying to steal their invention or to keep their invention from the public. Most of us can just see that those inventions do not – cannot – work, and don't want gullible people to lose their money on them. To prove our motives, we openly tell exactly why those inventions cannot work.