Horrible video proof. The marker the guy uses is a reflection of a building on the ground. If they are moving away from the ground, the reflection of what's on the ground will also change. And it is an unsteady video, and short, low altitude ascent. Figuring out what is optical illusion and how things would really look on a globe earth without error are beyond most people's abilities. Let us not open ourselves to being so easily deceived by things that are of relatively little importance to our purpose in life.
Youtube is bizarre. In my own library history, it won't pull up any flat earth videos I've watched in the past. It will only pull up debunker videos. I have to remember the name of the video or the channel and search it out all over again. Why?

Anyway, here is the original video.
1min 51 secs
It's not a reflection. It's very clear and real life demonstration of something that can only happen on a flat plane and not on a ball.
It shows how the vanishing point perspective rises as you rise in altitude just like the other demo video with the rising balloon I showed.
Here, the graphics were improved in this one:
1min 4sec
On a ball, the horizon line would drop down lower and lower as you rise higher and higher.
But that never happens.
Vanishing point. Not curve.

The horizon line is not from the curve but from your visual limitations.
It rises as you rise which
can only happen on a flat plane.On a ball it would
drop down lower.Artists understand this. The three drawings below are from a graphic design website. What do you think is happening with the horizon line in these three drawings?

The graphic design instructor explains:
In this illustration, the horizon line is where the blue sky meets the brown street.
Perhaps in the left hand drawing the viewer is sitting on the sidewalk, so the horizon line is low. In the right hand drawing the viewer is standing on the roof of a building, therefor the horizon line is higher
https://graphicdesign2013.blogs.kpbsd.k12.ak.us/2013/03/06/perspective-scene/On a ball earth, the horizon line would be the exact opposite. The line for the person sitting on the ground would be low and the person on the roof top would be higher.
According to the ball earth Drop chart the horizon line 100 miles away should DROP down over a mile below you. It doesn't.DistanceCurvature1 mile0.00013 miles = 0.67 feet2 miles0.00051 miles = 2.67 feet5 miles0.00316 miles = 16.67 feet10 miles0.01263 miles = 66.69 feet20 miles0.05052 miles = 266.75 feet50 miles0.31575 miles = 1667.17 feet100 miles1.26296 miles = 6668.41 feet200 miles5.05102 miles = 26669.37 feet500 miles31.5336 miles = 166497.53 feet1000 miles125.632 miles = 663337.65 feet
This is also why you "level out" when you reach cruising altitude otherwise you would have to adjust the plane nose down
and after flying 500 miles the plane would have to adjust downwards
31 miles!!
Have you ever felt your plane going nose down? Say a quick act of contrition if you do!
The horizon line RISES to eye level and doesn't DROP.
That's the
opposite of what would happen if you were rising above a ball.
I don't like calling people names, but the photos in this meme demonstrate it further.
You should not even see a horizon line in the top photo. It should have dropped away below you as you look out over the ball.

