Use a tool like MediaInfo . This will tell you the video codec, resolution, and sometimes the "Encoding Library," which might give a hint about who created the file (e.g., a specific release group). 2. Safety Precautions
Since mysterious files with alphanumeric names can be risky, 1. How to Identify the Content 3bd192c05d51550beefed0c6c88edeb6.mkv
Because the filename is just a hash, the name itself doesn't tell you what the video is. You can try these steps to uncover its identity: Use a tool like MediaInfo
Ensure the file is actually .mkv and not something like .mkv.exe . If you have file extensions hidden in Windows, a virus can easily masquerade as a video file. and sometimes the "Encoding Library