My belief is that every flat earther is just out there to be trolling everyone else.
There is absolutely no way anyone can be that blind to reality and making up excuse after another, after all failed and debunked “science” experiments they make.
I used to think that, but no longer. Many of them are true believers in flat earth, and also, are convinced of hundreds of other things that aren't true either.
Sure lots are trolls. But there are lots and lots (majority of the movement) are real believers.
Using Occam's razor, I posit that these videos exist because there are too many people watching them; not because there are too many flat earthers out there. I am yet to meet one in person.