Some movies have a narrator, who is also frequently the central character. We make the assumption that the narrator is telling us the truth. The assumption is faulty. Sometimes the most important material because the viewer must figure it out and add it from his or her intelligence or knowledge. Characters are a collection of traits, of course, and these traits can and must be given to the viewer through the plot.
Most movies do.
But if you present information out of order, it enhances interest in the story because it engages the viewers' minds. Groundhog's Day shows an example of that when she slaps him over and over again. It's to show that no matter how he tried, he doesn't succeed in going to bed with her. He had to change himself and his tactics. These facts are often hinted at or stated right out, but they tend to be evident.