...which isn’t what he said. He said it would be normal whether you stay in or switch out. Which is just wrong.Actually the test showed, that it indeed hits as normal type move if a mon with the ability normalize is on the users side of the field when it hits. It only changes its type, when the normalize mon isn’t on the field anymore.
If you stay in, it is normal. If you switch out and stay out, psychic. If you switch out and back in, normal. That’s not predictable.