Since "prbackup" is often used as a shorthand for "Project Backup" or "Personal Recording Backup," it doesn't belong to a single mainstream commercial show, but rather to niche creator archives. Blog Post: Managing and Playing High-Quality MKV Backups
MKV files often use AC3 or DTS audio. If you have no sound, check if your player supports these formats or try VLC. prbackup ep 128.mkv
To keep your "prbackup" folder clean, use a tool like TinyMediaManager to automatically fetch metadata or rename files into a Series Name - S01E128 format. This allows media servers like Plex or Jellyfin to recognize the file and provide descriptions and poster art. Since "prbackup" is often used as a shorthand