dollarlayerGreatly different size of north America? https://www.pachamama.org/wp-content/uploads/2012/01/EarthComparison_550.png Why?
you realize that the earth is a sphere right? if you rotate a sphere on camera, especially with a very narrow focal length you'll see the features start to warp. Since you seem to accept youtube videos as proof, you can compare this with this and this video. As the camera zooms more and more the warp becomes less and less noticeable. The earth is a very large ball and the photo is taken from quite close so the effect will be FAR more pronounced, as the subject would take up less and less of the total visible area
This happens because you're trying to project a round surface onto a flat plane. When you're taking photos of the earth, the entire earth takes up 180+ degrees of the FOV, meaning that directly placing them onto a flat image will cause severe warping. Taking photos from farther away would mitigate this.