I thought Mind Field was really cool. Obviously a very different feel to the normal vsauce videos but … I dunno, I don't see what's wrong about going that route.

Derek of Veritasium is trying to go that route by himself. He released some documentaries of his own (which actually were of lower quality than his regular material, I thought).

Wendover is also releasing some long-form documentaries. He's much better at it, actually.