That’s not true. The buffoonery aside, he is making clear and logical points that anyone on the opposing side must think about and address.
The problem is that he makes up his own "opposing side" - and I doubt his imaginary friends are going to respond in any way that we could perceive.
Rather than presenting an actual FE model (I'm not necessarily saying
our model, but one he could actually provide a reference to), he simply asserts what Flat Earthers believe based on... well, I dunno what. His imagination?
He has done the same in every "testing <x>" series. I'm sure it's hilarious to make fun of homeopaths and whatnot, but because of his inability to restrict himself to material which actually exists, the videos are only (arguably) good for entertainment, not discussion. You'll note that, back when this conversation wasn't an extremely stale thread that someone necro'd, not even the resident Round Earthers had much love for how it depicted our beliefs. There's a good reason for that.