* One thing I don't want to see is a long introduction. Start out by discussing the problem your technology solves and what an audience member will gain from your talk. I don't like having to sit through 5-10 minutes of "This is me and this is what my company does." before I even know if I'm super interested to sit through the thing. A bit of self-promotion that's relevant to your talk is great, but save it for a bit after the introduction of the talk once you've got the audience hooked.

* I would suggest to watch a few of Fireship's ____ in 100 second videos, where some funny nerd covers the basics of different technology topics in 100 seconds . It's a good mix of overview, tiny code snippets, diagrams, explanations, and humor. The pace is faster than a talk needs to be due to the very short time limit, but that might be the right kind of vibe to try and nail.

* I don't think you necessarily need to include long code snippets, but short code snippets to illustrate points are great. Also, please include some short links to code repos with your longer examples in your slides. I like to look at videos to learn some technology or technique, but it's tough to absorb with the long code examples in video format spread throughout multiple files. Provide a link to a repo for your talk in the slides.