Attractive tends to be reserved for people. If you want to say something is good looking you would use "aesthetic". Example: I saw a movie and it was quite aesthetic. I agree with the comment above though that "watch" would probably be better, as out of context using "see" instead of "watch" does have the connotation that you aren't really paying attention when you're looking at it. If you went somewhere to see the film then saw would be used, but if you watched it at home then you'd use watch. You normally "go and see a movie".

It would be better to say "I watched a movie and it was quite attractive." "to watch smth" is usually used, when you speak about a period of time, and "to see smth" - when it was a glance (correct me, if I'm wrong)