Twitter has launched Vine, an addition to the social network that allows users to embed six second videos within their tweets.
The service was used first by Twitter boss Dick Costolo, who posted a clip of himself making steak tartar.
Twitter bought out developer Vine Labs, a start-up based in New York, in October last year.
The program is available as a stand-alone app in the Apple App Store - but not yet on other platforms.
Videos posted on Vine are on an infinite loop - in a manner similar to animated GIFs, an image format that has been popular since the very early days of the internet./BBC/