MKV files usually have three extensions:
.mkv – Include subtitles and audio
.mka – Include audio-only files
.mks – Include subtitles only
How to play an MKV file?
The first step would be to download an appropriate codec. After downloading and saving, you need to install it on your PC. After installing it, right click on the file you want to open and open with your preferred application. If any error is encountered while opening the file, it is likely that you have not downloaded the correct codec. You can repeat the process again.