That does make sense but...
In the video he says for every mile there is an 8 inches curve, with naked eye you can see 3 miles in the ocean and with good camera or telescope a lot further and you can see that nothing goes under the horizon.
And about the antarctica, no you cant go, you can only access a small part of it and only with guided tours, and security armed weapons.
RE: Flat earth - the beginning of my research