Actually they are Over-Unity machines, see 9 GIFs That Make 'Perpetual Motion' Machines a Reality, actually its crap, as perpetual motion defies the law of physics, sort of like the guy who walked on water.
Perpetual motion machines are designed to produce unlimited energy. In other terms it runs for infinite time. But in doing so it violates Laws of Thermodynamics. It has been classified by the law which is being violated in the machine.
This flat-packed wooden toy will keep you occupied for hours as each turn of the crank unleashes an endless cascade of ball bearings. Its maker also offers another configuration, and expects them to go on sale soon.
Step by step make your own marble machine. The kids would love this! Wonder how long the neighbors would let us borrow their scroll saw??!! Probably a long time if I barter some pulled pig sandwiches for the saw time :)