I definitely spend a lot of my entertainment time watching youtube. I really agree what you're saying as far as big content creators not offering much substance to their videos, but it's wrong to think that the "big youtubers" are the only ones making things on Youtube. I have my subscriptions filled with some pretty amazing smaller youtubers who are making great, cerebral content all the time. I'm more interested in non-fiction, while it sounds like you're looking for fiction and story-telling, but I'll share some of my favorite channels anyway
Definitely some interesting stuff there so thanks for sharing. I do agree there is interesting stuff to be found I just find it really hard to see why the popular content is popular (other than the personality cult I mentioned). And I'm usually someone who is perfectly happy enjoying mainstream/popular content (I'm not that discerning) so found it odd.
PBS idea channel - https://www.youtube.com/channel/UC3LqW4ijMoENQ2Wv17ZrFJA
Historia Civilis - https://www.youtube.com/channel/UCv_vLHiWVBh_FR9vbeuiY-A
Langfocus - https://www.youtube.com/channel/UCNhX3WQEkraW3VHPyup8jkQ
Crash Course - https://www.youtube.com/channel/UCX6b17PVsYBQ0ip5gyeme-Q
Baz Battles - https://www.youtube.com/channel/UCx-dJoP9hFCBloY9qodykvw
Wendover Productions - https://www.youtube.com/channel/UC9RM-iSvTu1uPJb8X5yp3EQ
Practical Engineering - https://www.youtube.com/channel/UCMOqf8ab-42UUQIdVoKwjlQ