What is bilibili?
Bilibili (stylized as bilibili, Chinese: 哔哩哔哩) is a video sharing website themed around anime, manga, and game fandom based in China, where users can submit, view, and add commentary subtitles on videos. It is a domain having .tv extension. This website uses Adobe Flash Video and HTML5 technology to display user submitted videos hosted by third-party sources, while featuring a real-time overlaying subtitle system for interactive playback experience.
With the fast growing number of visitors on Bilibili, Bilibili decided to expand their functions. Besides the dominant themes, now Bilibili offers videos about music, dancing, science, entertainment, movie, drama, and fashion. Also Bilibili provides live broadcasting rooms where the host of the room is able to live broadcasting and viewers are able to interact with the host. Usually the topic is about anime game strategy.
Inspired by similar video sharing websites Nico Nico Douga and AcFun, the founder of Bilibili, Xu Yi (Chinese: 徐逸; known as "⑨bishi" on the internet), created a prototype website named Mikufans.cn after college graduation in three days. He relaunched the website in January 25, 2010 with the name Bilibili. Later in 2011, he founded a startup, Hangzhou Huandian Technology, to manage the development and operation of Bilibili.
Wikipedia: https://en.wikipedia.org/wiki/Bilibili/