In this video experiment light passes through air first, then through the glass wall of the aquarium and finally through the water with dissolved sugar. I don’t see how light acting a certain way passing through air + glass + sugary water is an evidence of how it acts when passing solely through the air.

Definitely, I suspect a properly organized experiment proving the light terrestrial refraction theory will require more effort than an amateur weekend project. That’s why I’m fine with any documented evidence of this phenomena occurring in nature that includes all the relevant data points like air temperature, pressure, humidity and relative placement of the air layers. If you manage to find any, please let me know.

The thing with terrestrial refraction and namely looming is that it only exists in theory and simulations like that guy created. But I never saw it properly documented in real life at any scale, neither as an experiment, nor as a full scale natural phenomena. I don’t try to debunk it. I try to find real evidence for its existence and so far have failed to do so.