I don’t understand where these forces come from, if inside and outside there is the same water. Why are you not satisfied with an ordinary electrolytic capacitor?
https://www.youtube.com/watch?v=lmVVdV8wuB0

Valves are open ,water inner and water outside opens for the atmosphere.
But changing  level of water doesn't sight.

I don’t understand where these forces come from, if inside and outside there is the same water.

Similar to how a dielectric is drawn between the plates of a charged capacitor.
In an effort to increase the capacitance, and reduce the energy of the capacitor. IMHO.
But don't worked out to me.

Electroboom's final video on Veratasium's 1C lamp video, 100% conventional but great demonstration how transmission line works, how energy propagates etc.

https://www.youtube.com/watch?v=9hhcUT947FI

In every case, half of the supply voltage reaches the load almost instantly through capacitive coupling and only after signal travels the whole length of the loop load "sees" if circuit is open or not. As he says

"As we predicted the waves have to travel at the speed of light to the end of the loop and return to the load before the load knows that the end was shorted or open and with 12 microseconds over 8 000 feet we get the speed of light."

So, in his first test with 2400m long wire, it takes about 12 microseconds for load to "see" if end is shorted but it does not jump to full source voltage cause wire has too big resistance.

And in his second test with 80m wire, it takes only 400 nanoseconds for signal to reach the load - directly proportional to wire length, when he closes the switch load "sees" half supply voltage instantly and after 400 nanoseconds if end is connected it jumps to full supply voltage, assuming load matches the characteristic impedance of the cable (Z=sqrt(L/C)), 100Ohm in his case, and when he puts 50Ohm load due to impedance mismatch and consequent reflections voltage climbs in steps to reach full Vcc.

Interesting stuff.