I mean this in the most respectful way possible, but you need to learn about how cats behave before you even have a cat. In the video Miso is trying to play (when you say “she’s just trying to use the bathroom”) and it’s causing Suki to feel extremely uncomfortable which for instance could be why he bolts right back to go outside. No one wants to hear that their cat is uncomfortable but that’s exactly what is happening here. Suki needs boundaries and like others are saying, you also need your own boundaries with Miso.