Because MKV files can use various codecs, you need a player that supports a wide range of formats.
MPC-HC (Media Player Classic) or PotPlayer for Windows. 3. How to Convert or Edit the File
Click , select Video - H.264 + MP3 (MP4) as the profile. Set the destination file and click Start [1].
Knowing this will help me tell you exactly which player or converter to use.
To give you more specific advice on this file, could you tell me: