What are some topics in rust that deserve more coverage on youtube?

I have been playing with rust for the last couple months and have been really wanting to make a programming tutorial for it. Is there any topics in rust that aren't well covered and would benefit from more videos explaining the topic?

Edit #1 - Thanks guys for such good ideas, I am really excited to start working on some of them and post the progress here. The rust community has been one of the most supportive community I have part of and look forward to giving back to it. Also, if you would also like to make a video on a similar topic feel free to pick ideas from here and DM me if you wanna collaborate on research.

Edit #2 - Reading through the comments you guys have left, I am coming to a conclusion that the biggest gap in the rust YouTube space is the lack of tutorials to build specific things (such as Api servers and Desktop applications). Thanks for helping me identify an area for me to start creating content in and would like to reiterate that if anyone wants to also make videos in this genre and area I would love to collaborate with you.