The curve is missing, where it should be visiable.
You can fly a rocket in a circle around the northpole and it would appear as you describe.
There are so many indications of greenscreen, hornests and buoyancy tanks in the nasa footage, that it is very easy to expose Nasa as fake.
You won't see curvature when you just look straight forward at the horizon. The only evidence of curvature in that footage is the fact that you can see further and further the higher you get. If you want to see curvature "to the sides", you'll need to look down at the Earth to get some form of angle.
A student team in Norway sent a balloon to the same altitude and took this footage
https://www.facebook.com/kogstarburst/videos/1496581273718019/
There you can clearly see the curve :)
But it doesn't matter. We already have plenty of images where you can see curvature. Like this one taken by SpaceX
How do you determine if it is CGI?
First of all, that's not a very clever way of determining if something is CGI, you are susceptible to your own human errors.
SpaceX have placed cameras at two places on their launch vehicles. One is attached to the main body of the Booster (First and lower stage of the rocket) pointing downwards, the second place is inside with the payload and the second stage engine.
Please tell me how any of this is faked.
I have a question for you, gravity. It pulls stuff together in a spherical manner, anything for e.g a flat earth would be immediately crushed into a sphere which we all know that it isn't except for you. So could you explain how it works on a flat earth?
You do know that it is basically the same altitude as the video you linked above? Right?...
But I just told you that we launched it in just one direction and that we can observe with the sensors onboard that it goes in a straight line... When we send rockets into geosynchronous orbit, it travels along the equator and only to the west, never making any turns, and still comes back.
You also need to explain why it obtains a higher speed when you launch it to the west along the equator than if you launch it to the East. Which is why all launch pads for launches to that orbit are kept close to the equator (like KSC in Florida for American launches, or Guiana Space Centre in French Guiana for European Launches).
You can't explain it because it 100% proves that the Earth is indeed a globe.
Please tell me why these ground stations can only communicate with flying objects when they are within a specific radius and why that radius increases the higher the object is above the ground.
That makes zero sense with a flat Earth model of the Earth. And is a complete debunking of the model.
Now tell me instead why we can do the math to show that the ratio at which an increase in the height of the object and the radius at which it can be detected by a given ground stations scales perfectly with the rate at which the Earth curves. I'm looking forward to your reply.