If you need to edit or share it, you can convert the file to a more compatible format (like MP4) using VLC or FFmpeg .
Use a tool like MediaInfo to check the audio and video streams inside the file. AgAD9wYAAlFmEFY.mkv
Based on your request, I cannot directly "open" or "look into" a specific local file named AgAD9wYAAlFmEFY.mkv as I do not have access to your personal files or a local file system. If you need to edit or share it,