OGV is a container that uses OGG open source format. OGG is unrestricted of software patents which was one of the main goals of its creation. OGV file extension is used to store video stream with or without audio which in turn may be compressed with the Opus, Vorbis, Theora or Speex algorithm. The format is used to play video content on web pages with the help of HTML5. OGV files can be played by wide variety of media players.

RMVB is a file format with a variable bitrate developed by RealNetworks. Actually it is an improved version of RM format. It gives greater bandwidth to videos that are difficult to compress. The extension keeps a high video definition. RMVB files are very popular in Asia and they are not supported by all popular players, so the easiest way to playback them is to convert them to another most common format.