Exaltcom.com does a line of sight test, achieving 150 miles of straight level observation. This should not be possible on a ball earth with a circumference at the equator of 25,000 miles.
Plenty of articles refer to the experiment, which wasn't intended to generate flat earth evidence. Notably here, here, and here.
A new Flat Earth Documentary by YouTube User, Lucid Truth, walks calmly and patiently through the vital considerations surrounding the shape of the earth.
With a sincere heart for those whom still doubt, Lucid Truth demonstrates a top notch compilation of the majority of arguments that have been collected surrounding Space Deception, and the shape of the earth. Also contains an enigmatic and somewhat under backed new position on the shape of the earth.
The original video has just over 6K views, but the mirror put up by Celebrate Truth already has over 570K with 6K likes.