Ask HN: Best practices for dev-focused How to guides/tutorials?

What is the best technical tutorial you’ve seen, and why did you love it?

Screenshots and code snippets of course, but what about animated GIFs? Succinct numbered steps, or descriptive paragraphs? Are well-edited videos better than text?

Background: I’m writing a few basic tutorials on implementing popular mobile app features. I know what I like in a guide, but…confirmation bias is a thing.