RealVideo

From MediaCoderWiki

RealVideo is a proprietary video format developed by RealNetworks. It was first released in 1997 and as of 2008[update] is at version 11. RealVideo is supported on many platforms, including Windows, Mac, Linux, Solaris, and several mobile phones.

RealVideo is usually paired with RealAudio and packaged in a RealMedia (.rm) container. RealMedia is suitable for use as a streaming media format, that is one which is viewed while it is being sent over the network. Streaming video can be used to watch live television, since it does not require downloading the video in advance.