>>95924461zatsudan, karaoke, roleplay, presentations on topics you're passionate about, drawing + zatsu, crafts or cooking on handcam, coding, story or manga reading, any stream involving audience participation, retro computing (rare, should be more of this), vtuber model rigging, music producing, crazy science projects (think uwoslab).
There's so much other than video games. They're used so heavily in streams because it's easy, not because it's quality entertainment. But I consider even plain zatsu and full attention to chat to be better than gaming.
