Other than the ones already mentioned:
- Sirajology - walkthroughs of building basic AI applications
- Tom Scott - Interesting infrastructure and nerdery
- Jay Foreman - Infrastructure and Government, with more absurdity and singing
- CGP Grey - weirdnesses of politics and political systems. I find the joint implications of his videos Humans Need Not Apply and Rules for Rulers interesting
- Geography Now! - basic intros to countries in alphabetical order.
- Xidnaf - linguisic and etymological geekery
- Historia Civillis - History, mostly Roman and Greek
- Extra Credits/History/SciFi - video game and literature analysis as well as historical narratives
- the vlogbrothers empire is vast and varied. You’ll discover a bunch from there.
Open Question: Does anyone know any good channels about textile engineering and clothing history? Perhaps with a side of fashion design and supply chain management?