YouTube is an American video-sharing website headquartered in San Bruno, California. The service was created by three former PayPal employees — Chad Hurley, Steve Chen, and Jawed Karim — in February 2005. Google bought the site in November 2006 for US$1.65 billion; YouTube now operates as one of Google's subsidiaries.

YouTube allows users to upload, view, rate, share, add to favorites, report, comment on videos, and subscribe to other users. YouTube earns advertising revenue from Google AdSense, a program which targets ads according to site content and audience.