: It is a Matroska Video (MKV) file. This is a versatile "container" that can hold high-quality video, multiple audio tracks (like different languages), and subtitles all in one file.
Could you share where you found this file or from it? I might be able to help identify the content if you have more details. MKV Files Explained - Adobe AgADVwgAArdTsFY.mkv
To see what's inside, you would need to open it with a compatible media player like or MPC-HC . : It is a Matroska Video (MKV) file
: Strings like "AgADV..." are frequently associated with Telegram's internal file-naming system for videos uploaded to channels or chats. multiple audio tracks (like different languages)
