Livestreaming, or live-streaming or live streaming, is the streaming of video or audio in real time or near real time. It is often referred to simply as streaming, though recorded content, such as video-on-demand, vlogs, and YouTube videos, are streamed as well but not live. Livestreaming services encompass a wide variety of topics, from social media to video games to professional sports to lifecasting. Platforms such as Facebook Live, Periscope, Kuaishou, Douyu, bilibili and 17 include the streaming of scheduled promotions and celebrity events as well as streaming between users, as in videotelephony. Sites such as Twitch have become popular outlets for watching people play video games, such as in esports, Let's Play-style gaming, or speedrunning. Live coverage of sporting events is a common application. User interaction via chat rooms forms a major component of livestreaming. Platforms often include the ability to talk to the broadcaster or participate in conversations in chat. Many chat rooms also consist of emotes or emoji which is another way to communicate to the livestreamer.