7d5b17e185069e5c77b4c945e4fa29b5.mkv

: Temporary files from streaming apps or video editors.

The string 7d5b17e185069e5c77b4c945e4fa29b5 is a 32-character hexadecimal code. To find out what the video actually is, you can use the following methods: 7d5b17e185069e5c77b4c945e4fa29b5.mkv

: Open the file in VLC Media Player or MPC-HC and check the "Tools" > "Media Information" (Ctrl+I). Sometimes the metadata tags (Title, Comments) contain the real name. : Temporary files from streaming apps or video editors

: Different languages or director commentaries in one file. 7d5b17e185069e5c77b4c945e4fa29b5.mkv

: Multiple SRT or ASS subtitle tracks that can be toggled on/off.

Since the extension is .mkv (Matroska Video), the file is a container. Unlike .mp4 , MKVs are popular for high-quality "deep" releases because they support: