The file appears to be a video file, likely shared or downloaded through Telegram . The string "AgAD..." is a characteristic part of the internal unique identifiers Telegram uses for media files stored on its servers. What is an MKV file?
: Information like titles, chapter markers, and cover art. How To Play MKV Files On Windows 10 ?
: Unlimited tracks, often in high definition.
MKV stands for . It is not a video format itself but a multimedia container . Think of it like a digital box that can hold:
: Multiple languages can be embedded within the single file.