Each gear has a reduction ration of ten to one. There are one hundred gears. That means for the last gear to turn once, the first gear must turn 10100 times…a googol times. The guy who built it says that the device will require more energy than the entire universe has to complete a single rotation. I don’t know what the power consumption of the device is, but given that “there are between 1078 to 1082 atoms in the known, observable universe” this means that the device will have to turn the first gear a minimum of 1018 times per atom in the universe. The video seems to show that it takes about 4 seconds per rotation of the first gear. Pretty sure that no matter how efficient the motor, how well lubed the bearings, spinning that first gear 1018 times is going to require a lot more energy than you’d get by converting an atom of even uranium into pure energy.
Not a terribly useful or practical device. Cool, though.