Novelists are solo story tellers (usually). Screenwriters are one of a team. If you have ever doubted the role of the movie editor in telling a story, then this amazing video may change that:
I can't even begin to imagine how much work this must have taken to produce. It is an editing miracle. Starting with nothing coherent, the editor has created a gem. Consider then, what an editor can do with a well crafted story, beautifully filmed, acted and directed.