I know nothing about the subject but an idea is to use a "let's make a demo" story to, as you say, capture the important journey instead of the end result. It

I know nothing about the subject but an idea is to use a "let's make a demo" story to, as you say, capture the important journey instead of the end result. It takes more effort than a simple "how it works" explanation but if done correctly I think it should explain how the demo works while also capturing the magic of the creation process.