Storyboard & logline
To visualize for research into a multimedia production, making a storyboard is a very strong tool. A storyboard is a series of (simple) drawings with or without comments to show what the (audio)visual part of your product will look like. It’s a powerful solution for improving your production and for pitching.
What is a storyboard?
How to draw A-grade storyboards (even if you can't draw!)
How To Storyboard for Animation (Part 1)
As an alternative to a storyboard you can create a logline of your planned multimedia production. A logline is used to focus your story.
What is a logline?
Read (external website)