We've been over this before.By virtue of the First Law of Thermodynamics ENERGY has no beginning or end. You have NO knowledge if the SLoT.By virtue of the second law of thermodynamics matter and energy must have a beginning.
Yes and your OWN video says "nothing" consists of equal parts negative ENERGY, not a nothing, and positive ENERGY, also not a nothing. You should have watched your own video before you posted it.
Not to the scale that was produced during creation. More like virtual particles popping into and out of existence rather than the mass creation of 2 billion times the matter of the universe occupying the space of a proton. It's that whole quantum mechanics thingee.