YouTubers, sometimes referred to as YouTube personalities or YouTube celebrities, are a class of internet celebrity who are popular because of their videos on the video-sharing website YouTube. Some YouTube personalities have corporate sponsors, who pay for product placement in their clips or production of online ads.

YouTube is a video-sharing website headquartered in San Bruno, California, United States. The service was created by three former PayPal employees in February 2005. In November 2006, it was bought by Google for US$1.65 billion. YouTube now operates as one of Google's subsidiaries. The site allows users to upload, view, rate, share and comment on videos, and it makes use of WebM, H.264/MPEG-4 AVC, and Adobe Flash Video technology to display a wide variety of user-generated and corporate media video. Available content includes video clips, TV clips, music videos, movie trailers and other content such as video blogging, short original videos, and educational videos.