A video sharing site owned by Google. Users can freely upload their own video content to the site (you must have the rights to the content), as long as it is less than 10 minutes in length and the file is less than 100MB is size. YouTube makes it easy for people to embed videos on their own site or blogs, which helps with viral marketing efforts. Google results include YouTube videos as well.
Users can create, view, upload and download videos on YouTube. Some form of YouTube is also available on most mobile devices. Users can also rate, comment and save videos to their profile for later viewing. One popular aspect of YouTube is to follow an individuals 'channel', allowing you keep up with a series of videos.
Note: Before submitting your videos to YouTube, it is very important to read its Terms of Service and Community Guidelines first.