RealVideo's a proprietary video format developed by RealNetworks. It was first released in 1997 and 's at version 11. RealVideo's supported on many platforms, including Windows, Mac, Linux, Solaris, and several mobile phones. RealVideo's usually paired with RealAudio and packaged in a RealMedia (.rm) container. RealMedia's suitable for use as a streaming media format, that's one which's viewed while it's being sent over the network. Streaming video can be used to watch live television, since it… (More on Realvideo)