How does the Fish Eye Lens effect explain this video? As you can see the Earth does not distort wildly due to a lens effect as it comes in and out of frame.
That's not the video the OP asked about, and no one has yet made the claim you are demanding stack answers for. That's not really fair, is it?
May I just ask - how is it not fair when someone brings relevant evidence to the discussion that is GE but it is fair when it is FE. This seems more unfair and a bit biased to GE.
What is with all the straw manning happening in this thread? Let's recap for a second.
1. OP posted a video saying it showed the Earth's curvature and asked for someone to explain how that could be.
2. It is then explained to the OP exactly how that could be.
3. Someone else entirely shows up with a red herring.
4. I point out that it's a red herring, not taking the time to also point out the fact that there are clear visual distortions in the goalpost-moving video (there are), but also point out that the initial video (you know, the one the thread is supposed to be about) also shows concave curvature on some frames, because lens distortion.
5. You show up to go back to the red herring comment to try and, I guess, justify it, and at the same time seem to imply that I would have no problem if it was an FE that wanted to move the goalposts.
Steps 3 and 5 in that chain of events don't make sense.