That video is just being misused. As anyone who has been in the far North or South knows, it's a common sight to have the sun and moon like that during certain parts of each year.
Flat earth klowns need to drop the nonsense, unless they can show where the edge is. If they can't do that, they need to crawl back under their rock. None of then has ever shown the edge, cause the planet is a sphere.
Flat earth nonsense is being propagated to discredit good people.