I see a cavitation in a liquid due to pressure differences.
Propellers do this in water.

IF they want to say that this cavitation bubble is the REGION of the elctron that is fine...but it is not the electron.

Quantum mechanics is very clear on the subject that you can not ascertain the position of an electron. And furthermore if you try you will change the state of the electron or photon by the sheer act of "looking".