With the latest version of After Effects you can run an algorithm that corrects perspective between two different videos. It looks like above. It brings them closer together, but something seems off. It should only be used for quick action shots where it’s not likely to be noticed. Thor flying down and slamming his hammer would be a great example as opposed to old man slowly walking to a microphone. You may notice the perspective fix in the latter.

You can also create a motion mask to let’s say take an image and separate the foreground like the mics here. The problem with the motion masks is that you get the popping you see here. But you can go in and frame by frame where it pops and fix it. I guess like the layered birth certificate, they just didn’t have the time.