: Use a tool like MediaInfo to check the metadata. It might reveal the original title, encoder details, or the date it was created.

The filename appears to be a system-generated or encoded string, likely a Telegram file ID or a unique identifier from a specific database or automated downloader. Because this is a cryptic identifier rather than a descriptive title, a "guide" for it depends on what you are trying to do with it. 1. Identifying the Content

Once you identify the video, you should rename it immediately to avoid losing track of it.

: MKV files themselves are rarely malicious, but "double extensions" (e.g., AgADvQADvXFxVw.mkv.exe ) are common ways to hide malware. Ensure your file explorer is set to "Show file extensions" to verify it is truly just an MKV.