Not all videos on YouTube are free. User-generated content is generally free to watch, but there is a fee to watch some videos on the website; many movies and television shows can be streamed on the site for a price.
YouTube offers streaming service not only for user-generated content, but also cartoons and other types of video programming. For example, the website hosted "The Interview" after the Sony film was pulled from movie theaters in 2014; it charged $6.50 for streaming services at the time of its release. Additionally, there are episodes of shows such as "Adventure Time" available for purchase.
Uploaded videos from most accounts are free of charge; some are sponsored by advertising revenue.