So like this website/platform where people play video games and other people watch them...Like a live stream youtube thing. Like there are every different game someone can be interesting in. Mostly I've seen him watching destiny and minecraft, but there are others i don't recognize. if you go in through the website, you can chat and interact with the person playing. If you watch on a platform, it is just watching them play. Usually the majority of the screen is their game, but a little corner like picture in picture Tv is the gamer/Twitch host person sitting at their computer with their headphones on like a DJ.
Some people just play and shoot the s***, some give hints on how to do certain things in game depends on the person. there is a level of watching/following/subscribing/sponsors that I don't really understand but it is where people can "play games for money". That makes the gamers interact more with people watching rather than just watching random people play.