Sitting is about feeling comfortable, no matter what species you are.
Red is a cat, who is orange. He is also, deep down, a person. At least when it comes to sitting. He's seen how other cats sit, and that's just not for him. Ever since he first saw a human dangle their legs off a platform, he thought, "that sit's for me." Now, he's finally free to sit as he pleases, even if judgy humans are gonna film him and say things like "you are not right." You are right, Red. Right, and very comfortable.