Off topic, but you seem like someone who might like these less popular music theory channels I really enjoy (all to do with harmony mostly)
Metaharmony - https://www.youtube.com/watch?v=JNKBF8Phj3M
The Labyrinth of Limitations - https://www.youtube.com/watch?v=86XSsHlJSrc
Synthase / Midnight Oil Collective - https://www.youtube.com/watch?v=-gWMW1Hkdik