It was interesting there was little to no swirl at the equator mark, but f I remember that specific experiment wasn't exactly done correctly because she didn't let the residual currents stop from pouring. also she could've used a more equal surface there are other videos where they control the variables better.
If it is false I'm saying we can do the experiment control all the variables put the funnel on a stable stand and level it to make sure it is upright. put confetti in the water to make sure theres no residual currents and see if it spins the correct way or not. If all the variables are accounted for and we can prove this wrong then it would help prove flat earth.
I read a published article once where some had worked out what it would take to perform this experiment with any confidence. They may have done it, I don’t remember, and I can’t find it now.
I believe it involved something like- a very high precision machined water vessel, mounted perfectly horizontally, isolated from air currents, with a special release valve to drain symmetrically, and the water left to stand for literally days to remove any net residual motion.
This isn’t as detailed, but a decent quick summary:
https://www.scientificamerican.com/article/can-somebody-finally-sett/I guess an alternative would be to take a statistical approach- flush a couple of thousand Northern Hemisphere toilets and a couple of thousand Southern Hemisphere toilets and see if there’s a significant difference.
Either way, I don’t think it can be done simply and conclusively. Other experiments and observations are much clearer.