(1)Movies are generally composed of conversations.
The conversation in person, I mean, in a real situation,
makes up for the lack of your true English skills.
You can repeat "you know? you know?,
or utilize non verbal communication strategy like "body language"
or expect hearers' comprehension.
(2){This is another version} Movies have "conversations" all right, but they are fictional and a bit different from those you have in a real situation of your life. Therefore, if you want to acquire true conversation skills, just watching movies is not good enough. You need to interact with people in person. While doing that, you may make mistakes, such as repeating your phrase unintentionally, and have to use body language or depend on your audience's comprehension, but all of that helps.
