If you found this file in a random folder or received it from an unknown source:
Go back to the Telegram chat or channel where you downloaded the file. The caption or the context of the conversation is the most reliable way to identify it. AgADLQkAAsFo4FY.mkv
Since the filename is an encoded string, you can use these methods to figure out what the video actually is without a full manual review: If you found this file in a random