Where a lot of people get tripped up by this sort of concept is that it may indeed operate for a VERY long time on the initial energy that got it started, which simply makes it an efficient machine, not perpetual motion.
In reality his machine is similar to an orbit.
Because springs in reality are not efficient (a vibrating spring eventually stops) just having the spring flexing is absorbing and returning energy in an imperfect way. But given enough input the ball may keep rolling for long enough to be neat sculpture.
Harnessing that energy to do any work? No.
Gaining more energy than it is absorbing (even if it is just absorbing energy from the vibration of people walking through a museum) = not perpetual.
Physics just ain't broke.
But for serious, this guy makes some great tits. Bravaaaaa