Miracle in the Physics of Hydrokinetics

This device apparently uses the kinetic energy of the moving water in the stream to lift itself up against the force of gravity.  Or maybe energy was used to pump it up.  So far, so good.

But then it releases the water and extracts more energy than went into lifting the water!  Wow.  Would an average 10-year-old kid believe this?

And what happens after five years?  Does it evaporate? Self-annihilate? Implode? Rapture itself into heaven?