I think the main reason lemmy is mostly news, memes and discussion atm is that thats something everyone can do/ participate in. And since there arent that many users right now, thats what most content is.
Though I for one would be very happy to see such projects: self-made art, music, crafting, cooking, whatever else people are up to. And I dont think im alone in that
Lol of course its PragerU. I remember they had a similar video defending slave-owners a couple years ago, but at least that one was taken down pretty quickly.