There's a great Yiddish word--
Actually, let me start again.
There are a million great Yiddish words, and among them is "zitsfleisch." It literal means "sitting flesh," and it describes the ability to sit patiently for long periods of time.
It's an essential quality for a truly obsessive movie lover. I think I've got pretty good zitsfleisch. I can happily watch three movies in a day, and I've watched seven movies in a single 48-hour-period on more than one occasion.