Because these names are randomly generated IDs assigned by Telegram's servers, it is impossible to know the specific content of the video without more context. However, here is what the filename tells us:

: If you were viewing videos on Telegram recently, the app may have cached it with this encrypted name.

: This prefix is a unique identifier used in Telegram's internal file system.

The filename follows a naming convention typically used by Telegram for media files (specifically video files in the Matroska format).

If you found this file on your device, it likely came from one of the following: