depends on the movie contents and depends on your time... but we shouldn't give too much time for watching movies
Watching some good movies in other hand can inspire you to perform a better work. Life should also be fun sometimes, watching movies can help to get loose from tensions and stress.
Movies as well as TV are a complete waste of time in my opinion. I never watch TV, however, I will watch a movie if I am sick and can't get out of bed and there is absolutely nothing else to do. I feel TV and most movies insult a persons intelligence.