Kathara is def better. Hanuman was good but just that, there were lot of cringe generic things and villians portrayal was childish. Only ending of the movie is highlet.
It is a concept that works on creating siphon and having head differential , that is keeping immersed portion at higher level than flexible pipe . If you take flexible pipe at a level higher than tank , water will not come out. Video bilkul fake nahi , it is scientific .
The other end of pipe should be at much lower height than the bottom of tank. He has not shown it properly. If tank is at first floor then the other end of the pipe should be at ground level. First take the other end to ground level then only open the outlet, which is blocked by bending the end