Cool -- I like VSauce and hadn't seen that one.
As for the flat Earthers, they'll agree it's round, but as a disc instead of a sphere. This would easily prove it spherical, as all you need to do is have people reporting all along as it orbits. Nobody will see an "edge" for the Earth's reflection. Perspective always remains the same because it's a sphere. 
Why? I mean, if his capsule and corpse pose a hazard to other satellites or the ISS, they'd need to bump him out of orbit, but a small booster could do that...
I seem to recall Scott Adams (the Dilbert cartoonist) thinks gravity works because everthing in the universe is accrlerating in size - however, his theory doesn't explain why different bodies have different gravitational accelerations yet their relative sizes don't change or how orbits work. He has a similarly wacky theory about why evolution by natural selection is wrong. I don't recall the details - life's too short to try to deal with innumerable bozo theories.
True
