This is a TAS (tool assisted speedrun); in other words, hacks. Under the hood, there were pauses and checkpoints used to create this run. It's meant to demonstrate what the perfect run would look like, and for entertainment.
Full TAS playlist: https://www.youtube.com/playlist?list=PLaphiC09M5gbrOku24MZGbdyMtUKWqRdL
Completed: Apr. 2, 2021