Infinite flow with capillary tubes?

[Warp]

I was watching this YouTube video by the channel The Action Lab:

At one point it shows this capillary tube phenomenon:

It got me immediately thinking: Conservation of energy much?

What's stopping that second tube from being bent into draining into the leftmost tube, thus creating an infinite loop of flowing water, which ought to be impossible because conservation of energy and stuff? If that were done, would there be some other phenomenon stopping the infinite flow of liquid? A perpetual motion machine shouldn't be possible.

 

[Dale]

A perpetual motion machine shouldn't be possible

It isn’t.

If the surface tension is stronger than gravity to lift it up then it is strong enough to keep it from draining. There will not be any flow