Well in the video he says that the whole "round Earth" thing is for the money in it. That's to explain the billions spent, he assumes they're making more just from proving it.
Makes no sense to me though, the explanation of how a round Earth could not exist was downright idiotic, I'm not going to sugarcoat it because it doesn't deserve to be.
So many things to poke holes in, but really, the most fun is the Sun and Moon being what... 3000 miles above us? (about 3:50 into the video)
I'd like to see how he explains the miraculous "flying machines" we use today, and how when they go above 3000 miles, the sun/moon are still above them. Just seems a bit strange, if they've ever been in a plane, they would see that the Sun and Moon are not floating around a disc.