In studying writing, I see a lot of examples drawn from movies. I do it myself. But, how much caution should one use in that regard? Movies aren't books, and books aren't movies. We've all known great books that made awful movies, and great movies that spawned awful books.
For example, "Show don't tell." Apparently first coined for screenwriters. But... doesn't it work very differently in movies?
Example number 1: "He looked at her with a sarcastic smile." In a book, this is the author "telling" the reader that "he" was "sarcastic." In a movie, it's a direction to the actor to show sarcasm through a smile, perhaps, if it's crucial, requiring a great actor to make the scene work.
Example number 2: Movies can sometimes get away with two hours of explosions and chases mascarading as plot and character development. The "show" is just so overwhelming with sights and sounds that we get swept along. In a book, that kind of action for action's sake gets old quick. "They went here and did that, then there and did the other, then..."
Are there other bits of advice that work better for movies than for books?