Opinions
I think the RTT is from a cat breeder somewhere else (possibly America, due to his accent, at least in the video) and has been bought by an owner who lives nearby. He has been accepted into the tribe (let's face it, even if they chose not to, they wouldn't have much of a choice. Look how strong he is!)
By Torizo
He is a true Cat. What Cats usually do is stick their butts in your faces. Now isn't that a Rum Tum Tugger thing to do?
By Silvana
CUUUUUTTTTEEEE!!!!
Disclaimer: These are my opinions. I don't mean to offend anyone by them, and you shouldn't be offended by them, because they might not directly reflect the character from the movie.