Put a bunch of flat earthers on a flight, filmed, and fly one-way over Antarctica, perhaps. The problem is that it would be such an easy thing to do, but they'll never allow it.
The video you refer to is just nonsense to discredit the movement. The FECore laser experiments conclusively demonstrate that (easy to find on Rumble).
People have a wacky opinions of flat earthers because the crumbs they are fed by the mainstream are there to make them look stupid. Like I said, I used to hold exactly the same opinion. I promise you, many of them we incredibly well versed on both models, often understanding the heliocentric model better than heliocentrists themselves.
If anyone wants to join one of Witsits streams (which I linked here) and can provide evidence for the 5 questions posed on there, refuting them conclusively, 500,000 sats are yours, compliments of me.