Isn’t it enough that movie previews show the whole movie? They leave nothing to the imagination. Your job is to give us your recommendations. Simple, yes?
As it turns out, no. You just can’t help expounding upon the oeuvre of the director, the film’s role within the history of film, the best moments of the movie and how they affect the story.
Enough already! Tell us why we should see the story, what it’s about. Sure, you can tell us some of the movie’s strengths—the acting, the story, the innovative approach to a true story or topic.
Just do it without giving the whole movie away, and save the pretentious verbiage for blogs, movie courses, and books.