If your default player won't open the file, it likely lacks the necessary codecs.
MKV files often use AC3 or DTS audio. If you have no sound, check if your player supports these formats or try VLC.
If you’ve come across a file labeled "prbackup ep 128.mkv," you’re likely looking at a high-definition recording of a long-running series. Here is how to handle, play, and organize these types of archive files.
: The gold standard for MKV. It is open-source and plays almost any file without extra codecs.