MKV files are video files which are similar to AVI and MOV formats and supports several different types of audio and video codecs. The MKV file format is an acronym for Matroska Video File.

Do you need to watch FLV or MP4 videos from Youtube? There’s no need to install QuickTime or some other large viewer. I’ll show you a small, stand-alone player.

Firefox Nightly Builds are set to get WebM support to watch the WebM coded videos in the browser. WebM is a new codec which will be used by Google Chrome, Opera and Firefox.