As video games have become more mainstream, so has gaming-related media. YouTube has seen an explosion of gameplay content in recent years, to the degree where many people make a living posting videos of themselves playing games. YouTube has become a household name, but many are starting to make the transition away from traditional online video to a dedicated live-streaming services like Twitch.
Two of the bigger booths at PAX East belonged to Twitch and Riot Games, publisher of League of Legends—and that's not likely an accident. League of Legends is streaming's breakout success story, even by traditional media's standards. So to find out more about streaming, we hit to show floor to learn what 45 million people already know.