I think this one was recommended either here or on the other site a while ago (probably by Tako) but she showed up in my feed:
It's in Japanese but the translation seems to be accurate and easy to understand. I really like the idea of vtubers doing themed educational content and wish there were more doing it. She recently did a collab with Kakapo, Raden, and some other vtubers who I think were all studying science or history. Maybe Pico can join them someday.
Speaking of vtubers doing educational content, here's our favorite Australian (woman?) on the Emu War: