Come on.
That's a heavily edited clip designed to convey a particular impression. With the point of the clip to show that Americans are stupid, of course that's what its going to show. Where are the people who knew the answers to those questions? Edited out.
The fact that YOU know the answers means that not every American is so stupid that they don't, right?
Its not South/North, rural/urban, either. There are dumb F'in idiots in every major city in the USA, including the Northeast. Go spend some time in Brooklyn, Philly, Chicago, etc, and tell me there are no boneheads there. There are also smart people pretty much everywhere, though obviously you're going to have fewer of them in less densely populated areas.
I guarantee you, you could go to lots of places in Rural bumblescrew USA, and still get correct answers to all those questions. . .so long as you asked the right persons.
I could go to Mobile Alabama in and in twenty minutes find 20 people who each knew every answer to all those questions.
Conversely, you could ask similar questions of all sorts of people in the world, and you'd equally boneheaded answers.
I've been to Western Europe, the Middle East, Asia, and I can assure you, its not as if there are nothing but "brain surgeons" are walking the streets there, either.
In fact, if you want to compare prevalence of what might be termed "crackpot" beliefs, I think Americans are actually pretty resistant to those sorts of things, as compared to much of the world.