I can provide a more detailed security analysis with this info.

Opening the file may reveal the content the sender intended to share, but ensure your antivirus software is active before doing so. 🛠️ Recommendation

The prefix AgAD is a common identifier for Telegram-hosted images and videos.

Only open the file if you recognize the Telegram chat or channel it originated from.

This file was originally uploaded to or downloaded from Telegram .

Ensure "Hide extensions for known file types" is disabled in your OS settings to confirm it is truly an .mkv and not an executable.