[amluto]

It’s surely hogwash. I like how it’s “validated” but does not mention power consumption or measured thrust.

For what it’s worth, one can very straightforwardly produce thrust using electromagnetism: just shine any sort of light out the back of your spaceship. This is called a photon rocket, and it works because light has momentum. Very little momentum: thrust = power / c. It’s only worth doing if energy is free in the way that light hitting a solar sail is free or if you power it with something absurdly energy-dense like antimatter.