Use VLC Media Player or the Ultimate MKV Player , as they are highly compatible with the MKV format.
Interestingly, MKVToolNix v98.0 is a popular software version used to create and edit MKV files. It is possible the "98" in your filename refers to a file processed or created using this specific software version. How to Review the Content
The prefix "pr" often stands for "Private" or "Personal," indicating this is the 98th episode of a personal project or archived stream.
If the file fails to play or stutters, it may be corrupted. Tools like Wondershare Repairit are often used to fix damaged MKV containers.
If you want to know the technical "quality" of the file, use MediaInfo . This will tell you the resolution, bitrate, and original encoding date.