If you have no fuel in the carby the accelerator pumps wont work.
Use aero start or a little fuel down the carby , see if it starts.
If it does that proves a point you are out off fuel.
If its a facet pump (square in shape) it has an electro magnet ,that is what goes back and forth and pumps the fuel.
When you turn it off the ball pump sits on a seat, I would say the old one sealed well and was acting as a check valve and holding the fuel up in the line.
Use a clear hose and hook it to the pump outlet, suck on it to get the fuel up to the pump.
Hook it back up then see if it works.
If its the pump im thinking of they push , they don't suck.
Instead of a video of your pump noise why don't you describe it to us.
If the pump noise is a fast tapping sound its out of fuel and wants priming.
Do what I said above then let us know.
Jim