The Chicken or the Egg?

Maybe watching TV does cause ADHD or maybe I'm just weird. This year I haven't watched TV or movies hardly ever because I just don't have enough time to. Last weekend, I did have a somewhat free night and my roommate wanted to watch a movie together. But I could just not sit still and focus through the whole thing. That's not the only time it's happened. It seems like the past few times I have tried to watch a movie or TV show, I just can't make it through the whole thing. I don't know what it is, it might be a good thing. They just don't hold my attention or they get kind of sketchy or I just feel like my time could be better spent doing something else. Is it a phase or is this just the way it will be from here on out?