This is ridiculous.

Urine is over 95% water. Let us stipulate that it is 100% water.

Now, suppose we separate the water into hydrogen and oxygen using electrolysis. For every liter (kilogram) of water, we would get 111 g of gaseous H2.

Liquid hydrogen has about 1/5 the specific energy of gasoline. Let's ignore the fact that the hydrogen in the girl's machine is not liquid (and, thus, would require energy to compress it). If it were, it would produce the energy of 22 g of gasoline. There are about 2800 grams per gallon of gas. So, the energy output of a liter of urine would be .008 gallons of gas.

.008 gallons of gas would run that (say, 1000W?) generator for about 10 seconds. Even giving the girls a whole lot of benefit of the doubt, this bullshit contraption has zero-point-zero-Blutarsky chance of producing a net of any energy, once the heat loss of the generator, the compressor, and the electrolysis machine are factored in.

That no one on the Giz staff could see the problems in this orders-of-magnitude erroneous claim is even more disturbing. Did anyone even ask the girls to turn the thing on?

It's another Nigerian scam! A whole new meaning to the phrase "taking the piss".