If you received this file from an unknown source or a suspicious bot, be cautious about opening it, as randomized filenames are sometimes used to mask the true nature of content. AgADtAIAAkXhEEQ.mkv
Right-click the file and select Properties (Windows) or Get Info (Mac). Sometimes the "Details" tab will contain the original title or tags. If you received this file from an unknown
Since the filename is randomized, you cannot determine the content by the name alone. To see what is in the file, you can: be cautious about opening it
This specific naming convention ( AgAD... ) is a unique file ID generated by Telegram.
Use a player like VLC Media Player or MPC-HC , which are designed to handle .mkv files regardless of their filename.