Yea that's fake as fuck.
No flow regulation or pressure regulation in regards to throttle position. And the output of that small of a Hydrogen reactor would barely produce enough fuel to burn let alone run an engine.
Electrolysis is pretty cool for removing rust off of metal parts. The Sacrificial Diode material gets quickly eaten as the rust gets pulled from the part to the Diode. BTW that was Epsom Salt that he put in it to increase the Conductivity of the water. I used to have a 50 gallon plastic drum Electrolysis tank which I used to remove rust from old Tractor parts years ago.
And I know for a fact that those cheap ass Chinese carburetors on those Honda Clone Generator engines are Not adjustable. Even if it were adjustable, adjusting the Metering screws would do absolutely fucking Nothing unless you are running gasoline. The Metering screws adjust the fuel flow from the Float Bowl of the Carburetor to the Jets which partly atomize the fuel to allow it to burn efficiently. To Lean and the engine will overheat and blow up. To Rich and it will foul the spark plug after only a few minutes.
I know some shit when it comes to engines. Been working on them since I was old enough to walk. Dad used to bring me old QuadraJet and Thermoquad and old Zenith carbs from work to tear down, clean and rebuild when I was a little fella barely tall enough to fit a 20" bicycle.
Bullshit. Bullshit. Bullshit. Same Bullshit thing as a Permanent Magnet motor producing enough Power to not only keep running but to produce usable power. It takes power to Make power. No motor is, or ever will be able to produce more power than it uses.