A webisode is an episode of a series that is distributed as web television. It is available as either for download or in streaming, as opposed to first airing on broadcast or cable television. The format can be used as a preview, a promotion, as part of a collection of shorts, or a commercial.A webisode may or may not have been broadcast on TV. What defines it is its online distribution through video-sharing web sites such as Vimeo or YouTube, or its availability for download through peer-to-peer protocols, such as BitTorrent. While there is no set standard for length, most webisodes are relatively short, ranging from 3–15 minutes in length.