There are lots of claims of cars that run on water — most by burning the hydrogen atoms as fuel. The problem with this idea is the tied up in a couple of laws of thermodynamics. The energy needed to break down the H2O molecule is equal to or greater than the energy you get from burning the hydrogen.
However, these folks say they have it beat.
Note in the video that they claim to use the ELECTRONS to power the car. Not the hydrogen atoms.
Hmm…. I’d like to believe it, but many times it feels as though I’m from Missouri.