It's (power) is coming from the magnets, That power's the motor, that runs the generator, that turn's the MAGNETS. (and lights the lamp)
SEE perpetual motion !.
GOING to make a BIGGY to power the HummelBird !. LoL
The spindle looked like a piece of carved bamboo. Added to the other imbalances/tolerances, there's a lot of wobble there. It would be interesting to see if there is any video of a more precisely built version.