Great video.
So basically the idea now is that every pilot of a U2 plane is in on the secret of the flat earth, because to them it would be obviously true that the earth is flat. So they're straight up in on it.
But then for everyone else who has had the privilege of flying up that high, people such as the Mythbusters and James May from Top Gear, for these people, they come to realize when they are up that unlike everything they've been told, they actually can't see the horizon. However, out of fear being thought crazy, they decide to lie. I mean come on, the explanations just get more ridiculous with each try.
I'm using basic logic, which is something that people who question the shape of the earth actually seem to lack, even though they're the ones that claiming they alone have it.
Let's say that Space X launches a Space Tourism program where they can fly up about a dozen people to 100,000 or whatever height. After they do this and land, all dozen people come out and exclaim about how amazing the curvature of the earth is.
Now, if you're a proponent of the Flat Earth Theory, then clearly you know that something fishy is going on, because you're right and the earth is flat. Thus, using what I think is common sense, there are probably two possible reasons that the people came out declaring they have seen the curvature of the earth:
1) Space X is actually in on the trickery and they know as a company that the earth is flat, and they have built their entire space tourism platform on a lie, intending to deceive people and continue the hoax of a flat earth. Thus, Space X is guilty and the people are innocent.
2) The people are convinced to lie. In this case, Space X is still in on it, but now so are the people as well.
In other words, there probably isn't much that's going to prove it to a Flat Earth believer that the earth is round. In fact, I bet if they were to fly up themselves and see the curvature of the earth they would probably think that they were somehow being tricked. Conspiracy Theorists are often beyond reasonable thought..... as well.... this thread has demonstrated.