I used to teach my viewers of the basics of Elixir.
It's in Brazilian Portuguese, but it's kinda interesting how easy is to use Livebook and show some code for people.
I'm using this tool to teach the basics of Elixir on my livestream. I think there's a lot of good usecases for Livebook, not only machine learning and stuff like that.
https://www.twitch.tv/videos/991797943