Strange rotation of an electric rotor video1

#Roobert33 "Ball bearing Motor" the current passes through inner race of one side ball bearing , then to the shaft , outer race of other ball bearing , then to inner race , causes a temporally expansion of each ball , deforms it to elliptical and adds pressure between inner & outer race then cause a moment of rotation , for that reason , it needs a prime movement to sustain rotation , by the way it doesn't matter whether the current is DC or AC , it just used to heat up the balls.
This is an motor of a washing machine, I took his rotor. The rotation is generated at low voltage, 4-6 volts alternating current, but also in continuous current, by rotating the rotor in both directions. The rotation is created by means of thermal expansion of the bearings. When it rotates it generates a true short circuit. This demonstration is very easy to replicate, you must have a brush motor and remove it.https://www.youtube.com/channel/UCrgd8qJ7CE97PSaPJySR6wA
https://www.youtube.com/watch?v=f1xnQ9gWy1o
https://www.youtube.com/watch?v=BwABP9oARXU
http://www.physics.princeton.edu/~mcdonald/examples/motor.pdf

Видео Strange rotation of an electric rotor video1 канала Electric Experiments Roobert33