Alright. So why is it being stupidly claimed Brian Cox is a paid actor?
Here are the facts which anybody here can check for themself.
1. A low pressure pump cannot work by only pushing on air unless it has a method of indefinately increasing the size of the contained volume so that the original volume becomes a trivial amount of volume contained in a larger volume. For example an experiment is performed inside a syringe, where in principal the syringe can be made sufficiently long and sufficiently large all of the equipment can be installed inside the syringe before the plunger begins the long journey away from the experiment. However, using an enormously long small diameter syringe to keep increasing the size of the contained volume would be stupid because it would be much cheaper and simpler to use a small rotary pump.
2. The older style typical laboratory rotary 'vacuum' pump is using a piston in a cylinder to create high pressure in the pump that then flows out of the pump to the surrounding lower pressure environment. The same piston is used to create low pressure in the pump to cause higher pressure air in the container to flow into the pump.
3. The newer style laboratory pumps Use a technology called Rotary vane to reduce pressure to 0.001 Bar. The principle is, however, the same as in the older style pumps. The pump has a low pressure side and a high pressure side.

3. These laboratory pumps have no difficulty taking a portion of the air that in the container, separating it from the rest of the air in the container by containing it in the pump, and expelling this portion of the air so that it travels very far from the pump.
4. The molecules are not therefore
connected together.
5. The pump is
easily able to separate molecules.
6. Therefore, it is totally clear there is zero reason why a small and inexpensive low powered laboratory pump cannot eventually reduce the pressure in a large sealed container to 0.001 Bar, which is only a trivial 14.7 pounds per square inch less than the surroundings, and no reason why Cox is a paid actor.