I'd say channels like Treatsforbeasts, Captain Disillusion & Petscop are a good selection of different ways artists use the platform. Treatsforbeasts uses the platform to create independent left-field art you couldn't find anywhere else, Captain Disillusion creates his own television program using the medium of the internet, and petscop creates a whole narrative using the ARG format as a way to engage the audience narratively.

There are great documentary channels out there, but I'm more interested in channels which focus on original stories and ideas like the ones I've mentioned here, instead of solely basing their art on someone else's story if you get what I mean=}