A very easy method for overunity and its the real deal as they say.

[F6FLT]

F6FLT, yes, but in this one, the level is up, no ?
https://www.youtube.com/watch?v=f1mT61agKng

We don't know. The level is up in relation to the ground, but it is not known what the water outlet level is in relation to the water level in the pond, we don't see both at the same time.

[F6FLT]

In the syphon,
the water goes up from the excess air pressure caused by the difference in height.
Here it is pushed up by the atmospheric pressure, due to a vacuum in the tank.

It's the same thing. The vacuum in the tank is due to the falling water.

[telecom]

Except here it flows from the lower level to the higher.
I more inclined to think of the pressure differential.

[citfta]

I am always amazed at how few people on this forum actually know anything about basic physics.  The barrels of water can only work if the outlet is lower than the inlet.  The vacuum in the tank is working to stop the water from flowing out the same as it is acting to bring more water in.  The vacuum is measured in inches of mercury or sometimes in other units.  But the measure is for a given surface area of the water.  In this case the water is moved out of the tank because of the height of the water in the discharge line being greater than the height of the water in the incoming line.  This is called head pressure.  The higher the tank the more head pressure which comes from the weight of the water in discharge line in an area of a one inch column of water measured vertically from the top of the water to the actual output of the discharge line.  No matter whether the discharge line is 1 inch in diameter or 2 feet in diameter the discharge pressure is still the same.  You can just get more water through the larger line.

So the atmospheric pressure outside the tank is pushing down on the water outside the tank against the columns of water in both the intake and discharge lines.  The partial vacuum created by some water flowing out of the tank through the discharge line is acting on both the discharge line to keep the water from flowing out the same as it is acting on the water in the intake line trying to draw it in.  Since the pressure is acting equally on each square inch of water column it makes no difference whether the intake or the outlet is bigger than the other.  The only thing that will affect the flow is a difference in height of the water in those two lines.

NEVER GET YOUR EDUCATION FROM YOUTUBE!!!  Unless you are wanting to learn how to make fake videos.

[seychelles]

Well CITFTA , Please explain this one.