: Long, random strings are often used to hide the identity of copyrighted content. Downloading files associated with unknown hashes can expose you to malware.
: The hash might be needed for the software that downloaded it to verify the data integrity.
The characters ibfdekl4... are part of a naming convention often used by:
The suffix -mkv indicates that the underlying data is a container.
: If you are trying to find the source of this file, you can try pasting the hash into a specialized search engine like Google or a torrent indexer to see if it links back to a known movie, show, or software package. 4. How to Open the Resulting File If you have the file associated with this hash: