YouTube is a video sharing Web site where the community determines what is popular on the site.
Unregistered users can watch the videos, while registered users are permitted to upload an unlimited number of videos. Users can elect to broadcast their videos publicly or share them privately with friends and family upon upload.
One of the key features of YouTube is the ability of users to view its videos on Web pages outside the site. Each YouTube video is accompanied by a piece of HTML, which can be used to embed it on a page outside the YouTube Web site. This functionality is often used to embed videos into Facebook and MySpace accounts, blogs, and other Web sites where anyone can watch them.
YouTube Mobile allows some mobile phones to access YouTube videos, dependent on the provider and the data plan.