First of all, your script needs a narrative, it just might not be the exact kind you’re thinking of. Secondly, a lot of your video’s narrative will come from outside of the script. To the first point: best practices aren’t just to use visuals, but to use visual storytelling. In that story, you’ll need a protagonist and a conflict. The protagonist, or hero, doesn’t need to be Hercules; depending on your message, it might be your customer, or your company, or something else entirely. In terms of conflict, this is your pain point or the issue that you hope to resolve with your video’s message. Again, it could be many things depending on your topic: pollution, heart disease, debt, etc. To the second point, visual storytelling means that a good deal of your narrative will be drawn, not written in. In other words, when in doubt, write your message, and the artists will create drawings that tell a reinforcing visual narrative.