Let's start by saying that this guy is a fucking liar and/or a complete idiot, where did he get the 885ft number from? that number is only true IF your eyes are at sea level like your toe fingers. https://dizzib.github.io/earth/curve-calc/?d0=36.039529149746&h0=0&unit=imperial
We don't even know at what height the picture he is showing us was taken, my gues is that probably 10s of ft above sea level. Also we don't know if other factors played a role that day like tidal force, https://en.wikipedia.org/wiki/Tidal_force
Althought extraordinary claims require extraordinary evidence, he doesn't have to work so hard, all he has to do is to stand in a beach in Europe and send a light signal across the Atlantic Ocean, if the signal can be detected on the other side then he is right, as simple as that.
EDIT
This a$$hole shows us pictures (e.g. 3:16) taken much much higher than sea level and then gives us his "calculations" at sea level, as if we had eyes in our toes. Yeah sure!! earth is flat!! because... IDIOTS!!!
If the Earth was a ball this is what would happen when we tried to stand up.
People can't stand on balls silly head.
He is just clumsy...
It's so easy...
Hehe. Some expletives right there. But have you considered the supposed ciucumference of the Earth? If you make a scaled down copy of that by drawing a circle on a paper or cardboard and cutting it out, you can use that to verify if your horizon will coincide with it's curve. Because when viewed in perspective, circles' outer sides will perfectly align with other circles' outer sides.
hm.. I can't understand what exactly you are saying, my english are not as good as I would like them to be :(
Maybe an example, a link or a picture could help me understand more
Okay, I'm sorry I too can't put my meaning well into words clearly...let us start with something easier to do: Get 2 coins 1 much larger than the other, put the bigger one on the table, while you hold the smaller one and look at its edge directly perpendicular above the coin on the table while standing until the circles of both coins coincide. This same principle should also hold true for the Earth's horizon being supposedly globe(circular).
But if instead of coinciding you see a straight line(your horizon) intersecting the curve of your scaled down circle Earth(the cardboard you drew and cut), then the globe does not exist.
I got the two coins part but I can't understand how you can do the same thing with something HUGE like earth when you stand on it and something relatively small that you can hold on your hand while you stand on earth. I guess this could work if we were able to move far away from earth, but again there might be something that I still don't understand.
If you could find some picture or link where this idea originates from maybe it could help clear things up