Pay specific attention to 13:10-16:00 with the reflections of the birds over the water showing prima facie evidence that the water in front of the boat is a distortion. Now Heliocentric pedantic children are going to lash out in reckless abandon and claim that this image is still a problem for flat earth because the reflection of the bird is full while the reflection of the sail is not. This is easily answered. 1. The birds are closer to the horizon than the boat as you can see at 13:31-32, the birds fly in front of the sail. 2. The birds are a different size than the sail.
That’s a slam dunk folks.