Presto: Your MKV files should appear in your video library (provided you’ve added the appropriate folder containing your files, of course), and they should play just fine.

If you experience no sound when playing MKV video files in Movies & TV app on Windows 11/10, then maybe the codecs may be missing.

MKV is an open-source container format that’s useful for storing multiple files using multiple encoding types; many of us use the format when downloading and storing films and TV shows.