Not quite the same thing, but one thing I have seen is players that stream slower-paced games chatting with remote viewers.

On Cataclysm: Dark Days Ahead, Vormithrax, is well-known for this, and watching his videos has often been recommended on Reddit as a way to learn the (quite complicated) game, as he tends to walk people through what he's thinking about while playing.

Obviously, that doesn't work with every game genre; they have to be able to field suggestions and questions from viewers while concurrently playing. But for turn-based games, I think that it can work well.