I was making computer security videos for people, real basics for programming, networking, web interactions, number bases, bit math - stuff that you need to learn as a base to get into hacking. Grew my channel pretty quickly to 1k subscribers just by sharing them to reddit. I deleted it because I got annoyed that I was making content for YT for free (the videos are still archived on Odysee). It really didn't seem that difficult to grow though when you're giving it away.
For pure dev things, cover different algorithms or data structures. Mobile, gaming, and web will have large audiences but already some established channels.
Other tips -
- Get a good mic, mic stand, shock mount.
- Downsize your screen to 720p when you record so it is large enough for the average laptop screen to read. It is absolutely ridiculous when someone is recording a tutorial on a 4k monitor and the text is microscopic.
- I was less concerned about video but repurposing a DSLR as a webcam is a good move. Pay attention to lighting and your background. Some people like full bright lights, color LEDs are a good vibe too.
- Practice speaking. Slow down.
- Learn to edit so you don't worry about redoing your whole video in a single take. I didn't like editing so I would redo 20 minute videos a few times until I got it right.