Can you provide a measurement, some evidence, a mechanism, or a diagram to demonstrate this fascinating idea?
Absolutely.
1. (assumption) the earth is flat
2. (assumption) The footage above is inconsistent with the earth being flat, unless light is curved.
3. Therefore light is curved.
[edit] However I have worry that this conflicts with my Zetetic principles. Zeteticism says to trust primarily the way things appear, and avoid complex theories that try and explain away how things appear. But the appearance of the earth being spherical is almost palpable in that footage. It really
looks spherical. So it bothers me that I am essentially making up a complex theory of light bending to explain away that appearance. What do you think?