If you think the Earth is flat, all that tells me is that you're an idiot and I shouldn't take your opinion about anything seriously.
As much as I like NDT, I feel like making videos and counterarguments gives these people legitimacy they don't deserve. Like in the 70s or 80s flat earthers would get laughed out of the building, but now since it's the 2020s and stupid people can congregate on the Internet and spread their views, you have professional scientists entertaining this nonsense.