A lot of documentaries produced and published by ARTE are very interresting and are on various topics

- Physics/Astonomy

- Nature

- Social

- Economy

- Informatics

- etc

https://www.arte.tv

They have awesome youtube channels, but I know only about the frenchs one (they probably have french, german and english)

https://www.youtube.com/user/ARTE

https://www.youtube.com/c/arteplus7fr