Your research is extremely limited to real research.
And yes, he is proving "Flat Earther proof" is not true.
We can see a more clear in another post, also in the big bunch of links provided earlier.
https://steemit.com/science/@kerriknox/can-you-figure-out-what-s-missing-in-the-chicago-skyline-image-flat-earthers-never-pass-this-test-can-you
There is also a video if it's the only thing you understand.
RE: Flat Earth - True World