Jonathan Blow and George Hotz get pretty technical at times.
But if you want something that's a bit funnier and goes into the process of tinkering and working on interesting problems, I like Code Bullet on YouTube.
* Kitboga: mostly messes with tech support scammers, but sometimes works on helpful projects on stream
* strager: variety tech streamer. Mainly works on his project, quick-lint-js, but also spends a lot of time helping his viewers with their projects. Friendly and collaborative chat.
* museun: lesser known Rust dev, extremely talented
* kristoff_it: I believe he leads “marketing” (or something like that) for the Zig language. Obviously streams a lot of Zig :)
* teej_dv: one of the lead devs of Neovim, streams some work-related stuff too.
* rw_grim: one of the core devs of Pidgin, streams work on that.
* gamozo: hardcore, low-level development streams with a broad focus on fuzzing. This dude is a good example of a 10x developer ;)
+1 for Tsoding. Very smart fellow. Unlike most streamers, he always mixes up programming languages instead of focusing on a specific one. I find that interesting, but I also understand some people wouldn’t.
The Cherno's C++ guides were absolutely crucial in helping me get up to speed with C++ quickly. And a good reference for things I came across which I did not understand well.