One more thing: Possible ones attached to streamers would of course be optional just like it's up to them to use subcategories for the game (Speedruns, ___)
I'd be down for some more subcategories to be added to games (Speedruns, Role Play, etc etc). I'd also be for the idea to tag some to the actual streamers with basic stuff like "Newbie" (1-100 streams) and general stuff like that.
You got my vote.
I think Talk Show kind of works there as well as Filters within IRL to specify would be nice. IRL is definitely a broad category.