: Open the file in a media player like VLC and check the "Media Information" (Tools > Media Information) to see if there are any embedded titles or tags.
: Look at the Telegram channel or chat where the file was originally posted. The caption or the surrounding messages usually provide the context. AgADUQsAAsKbQVY.mkv
The filename appears to be a system-generated name, likely assigned by Telegram to a video file uploaded or shared on its platform . : Open the file in a media player