Planning, Scripting & Ideas
Creative brief
Also called: content brief, video brief, research brief
One page is usually enough: who this is for, what they should walk away with, the single angle, the points that have to appear, the references, the constraints and the deadline. Teams use it to keep a script, a thumbnail and an edit pointing at the same target.
Solo creators skip it and then rewrite the script three times. The value sits in the decisions it forces early, while changing your mind is still cheap. A brief listing everything the video could cover has failed at its job, because the whole point is to rule things out and leave the maker with one promise to deliver.