YouTube is a video website, the early stage was located in San Bruno, California, USA. Registered on February 15, 2005, it was founded by Shijun Chen and others to let users download, watch and share videos or clips. In November 2006, Google Inc. bought YouTube and operated it as a subsidiary. However, Google has been very cautious about how to make money from YouTube. On January 3, 2014, YouTube announced a demonstration of its 4K HD video streaming service at the Consumer Electronics Show (CES) in Las Vegas. The service uses Google's video codec, VP9. Unregistered users of the site can still watch videos directly, while registered users can upload an unlimited number of movies. And when the films have content of a potentially offensive nature, they are only available to registered users over the age of 18. As a current online video service provider in the industry, YouTube has systems that process tens of millions of video clips every day, providing a high level of video upload, distribution, display, and browsing services to thousands of users worldwide. In October 2019, Google shut down the YouTube messaging service.

In any case, with the spread of terminal intelligence, and with the development of the Internet, YouTube provides ubiquitous video to the world on the Internet. In the future, YouTube will mainly develop its paid business, and although it is the world's number one video site, it relies on advertising for the vast majority of its profit. Every year Google invests a lot of money in its operations (maintaining servers, bandwidth, etc.), and YouTube doesn't really make much profit. Recently, YouTube has started to develop its paid business. If you are interested in video and movies, come and enjoy YouTube!