You can create movies that can be delivered over the Internet with QT Pro. You can deliver a movie as an HTTP download or as a real-time stream.
HTTP download—This type of delivery allows website visitors to download the movie to their hard disk. Fast Start is a QuickTime feature that enables users to watch the movie as it's being downloaded (long before the whole movie has been downloaded) from a standard web server. Fast Start works well for short-form movies where file size is limited. It ensures high-quality playback regardless of the users' Internet connection speeds, though those with slower connections will wait longer before media starts to play.
Real-time stream—This type of delivery is provided by QuickTime Streaming Server, and delivers media in real time over the Internet, from modem rates to broadband. The file is not downloaded to a viewer's hard disk. Instead, the media is played, but not stored, by the client software as it's delivered. Choose real-time streaming (instead of Fast Start) for webcasts of live events in real time, delivery of long-form video, 24/7 Internet radio and TV channels, and other cases in which you don't want viewers to store the file on their hard disk. QuickTime Streaming Server uses the RTSP protocol.