[cpdiii]

I see massive pressure and volume. Where does it come from and what gives it the push? Curious. The video shows the results but shows not how it happens, it’s mighty impressive.

Big pipes and I would suspect a pressurized water tank or monster pumps. Both would work or perhaps both are utilized.

[right way right]

Post #34 link gives info on test and it gives some description of the system.
It’s basically like you guessed.
Pumps and accumultor tank system.

I just like big machines, big engineering feats etc.