It would be a lot better - and, I realize, a bit more work for the creator - if the other people in the background didn’t move as well.
Anyone can submit a PR (or fork) altering the frames here: zuckerberg.smile/assets/sprites.jpg at master · terkelg/zuckerberg.smile · GitHub
It’s just a 10 frames combined into a single “sprite sheet” jpg. Anyone with an image editor should be able to replace the backgrounds.
