MKV file extension is exclusively used by
Matroska is the Russian word for "nesting doll". Several dozen such dolls can be nested one into the other much like video streams in the MKV file format. This software project was originally started in 2002 and is still being developed. File extension File extension mka is used to store audio streams in MMC format, while file extension File extension mks is used to store standalone subtitle streams. Matroska multimedia container is not to be confused with file extension File extension MMC which is used by Microsoft Management Console files.
These is a large number of video players that can open MKV files ad support playing video streams from MKV files including but not limited to: "BS.Player", "DivX Player", "HandBrake", "Kaffeine", "MPlayer" and others.
For more general information about files, file extensions and registry you can read one of the following articles:
Download DriverCure, an award winning registry cleaner and keep your PC running error-free and at optimal performance.