Applied Science, Veritasium, and Smarter Everyday are some of my favorites. The series Smarter Everyday did on submarines and the Kodak factory were incredible!
I sure the economics work out in their favour and the actual content is still great, but for me it wasn't even a conscious decision more like a fading away.
Sad that these day giving even a hint of the actual topic in the titles seems to turn off the algorithm/viewers. That and "short" formats for videos that really need an in-depth discussion. Back to books it is I guess.