Let me just tell you this. If the concept of water engine was possible, hydrogen makes such powerful explosions that pressure for pistons inside the internal combustion engine is impossible to hold on, resulting with the explosion of the cylinder. That's why hydrogen is used only in engines for outer-space aircrafts because of their sole mass, which provides the engine with enough protection from internal explosions.
As for this whole upper text, I'm a little sceptical. Porn (even some clip) requires too much information (in bytes) sent to your computer to go just like that - unnoticed.
Edit (after reading some info about it) : The fuel cell purportedly split water into its component elements, hydrogen and oxygen. The hydrogen was then burned to generate energy, a process that reconstituted the water molecules. According to Meyer, the device required less energy to perform electrolysis than the minimum energy requirement predicted or measured by conventional science. The mechanism of action was alleged to involve "Brown's gas", a non-existing mixture of oxyhydrogen with a ratio of 2:1, the same composition as liquid water. If the device worked as specified, it would violate both the first and second laws of thermodynamics, allowing operation as a perpetual motion machine.