The filename appears to be an automatically generated string typical of files shared via messaging platforms like Telegram . File Overview
: Commonly used to "rip" high-definition content from discs into this exact format.
MKV not allowed into project (write protect or full message) - magix.info
: The prefix AgAD... is a common pattern for file IDs used by Telegram's internal naming system for media shared through their bot API or standard messaging [Internal Knowledge].
: .mkv (Matroska Video). This is an open-source container format.
If you need to view or modify this specific file, the following tools are industry standards:
: The primary tool for editing, merging, or removing specific tracks (like extra subtitles) and metadata without re-encoding the video.