Water on the Lake curves up not down!

This is a video showing the water on this lake actually curves up. In the beginning of the video, he demonstrates that his camera is about 6 inches above the surface of the water. You can see the horizon in the distance and a fishing boat. As he zooms out you will see a large container ship behind the fishing boat appear and a new horizon. The you can clearly see that the ship behind is actually above the nearer boat, and the land beyond now becomes visible. It is above the original horizon, not below as theory would have us believe. Then he zooms back in and you can see the original horizon. This could only happen in a concave earth. On convex or flat earth models this is impossible.