1fb86045cdf92915cb9ee01461d249db.mkv Here

Use a versatile player like VLC Media Player or MPC-HC , which can play almost any MKV file regardless of its name.

The string appears to be a filename consisting of an MD5 hash followed by a Matroska Video ( .mkv ) extension. 1fb86045cdf92915cb9ee01461d249db.mkv

The .mkv format is a flexible open-standard video container. It is widely used because it can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. How to identify the content: Use a versatile player like VLC Media Player