My thumb rule
My professor started his lecture in the art of storytelling by saying- “Always remember that no one knows anything”. But he knew the basic differences in writing and ingrained in us the difference in Literature writing in fiction/non-fiction and literary writing in fiction/non-fiction. Next is the category of choosing media. Now if you are writing for films, U’re canvass is bigger and larger and one has the liberty of telling the story with sketch of characters, the protagonist's challenges and how he makes it or breaks it or you can tell your story from medias res i.e from the middle and then go in flashbacks to tell the back story. In television your biggest nemesis is the remote. If you, in 30 secs of your Act 1, fail to hook your audience, he flicks the channel and there you lose him. Now if you are writing a book, there you have once again the liberty of gradually narrating your plot, but then if you do that same thing in movies, you’ve got to do so with visual