Comparing the 2 ships is not proof: Were they both full? Were they both empty? Was one full and the other empty? Were they the same size/design ship ? The real test is to film a ship going out to sea, preferably diagonally to the shore line (point of observation). It helps if it a calm clear day to maximize resolution/minimize haze at distance. As the ship approaches the horizon it becomes harder to see clearly. Now magnify and the ship will come back into view. Look closely at the waterline. You are not able to see it directly because of the optical noise close to the horizon at distance. However if the hull is brightly painted, you will be able to see the mirror image of the ship below the waterline. At this point if the surface of the water is still enough, you will see a region across the horizon line that is indistiguishable between the image of the hull and its mirror image below the water line. In between is the horizon line which due to shimmering cannot be focused on. The hull looks thin but it is just that you can't see the bottom of the hull because by this point it is beyond the vanishing point. Same for its mirror image (or mirage) off the water surface. But with increasing magnification it can still be brought into view. However, this cannot go on indefinitely because at a certain distance, regardless of level of magnification, there is simply too much material (air/water vapor) above the water surface (the column of air that is in the way of your optical path, ie the path light takes to get from the object (ship) to your eye or camera/detector. So there are diminishing returns in the ability of optics to resolve distant objects , but they can be viewed to great distances, especially using infrared, which is less hampered by atmospheric influences like haze. I am not saying it is one way or another for sure, but there are as many "holes" in either model. They are just not the same holes! And your video proves nothing unequivocally. Particularly, without controls, this is simply an interesting observation but certainly not the best that I have seen, by a long-shot!

So hilarious to me that people run out of zoom and that tells them water is curving. Hilarious

Mmm, I must gave a different type of telescope

All it's proof of is that the horizon hides objects beyond it. Cool, Who cares. How far is that horizon on that day? You don't even know how far the ships were let alone how far the horizon is.

Hey brother....it you take the the supposed curvature of the earth into account (witch you sould have done to prove the theory you believe in, of a ball earth) those ships that you use to prove your point, should have been "over the curve" by then, completely gone from you sight.....so you are actually disproving a round earth. Thank you for that😂