This article explains what an MKV file is, how to open it, and how to convert it to another file format.
Video file formats – MP4, MOV, MKV
A file with the .MKV extension is a Matroska Video File. It is a video container much like MOV and AVI, but also supports an unlimited number of audio, image, and subtitle tracks (such as SRT or USF).
This format is often seen as the go-to format for high-definition online videos, as it supports descriptions, ratings, cover art, and even chapter divisions. Because of this, MKV was chosen as the default video container format for the popular DivX Plus software.
Opening MKV files may sound simple: just double-click them like you would any other video file. But if you have a collection of 10 videos that you've pulled from 10 different places, you'll probably find that at least a few of them won't play properly.
