Most Helpful Guy
I want to be fluent in Chinese. I'm Chinese, and my English is far better than my Chinese. Still, watching movies isn't enough to learn a language. You need to read and watch at the same time.
You see, in movies, they don't usually talk as much as if you read a whole book, and the language that is spoken isn't as sophisticated (complex). If you read a book, you can look up a word you don't know. If you watch a movie, you can't ask someone in the middle of watching it, and you will likely forget afterward. So read and watch.