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!!!