Given the cryptic nature of the string, it fits the profile of or ARGs (Alternate Reality Games). These genres often use "found" file names to create a sense of unease or nostalgia for the early internet era. If you were to create a story around this, it might involve:
If you actually have a file with this name and want to see what's inside: TKUNDmp4
: Use the VLC Media Player to attempt to open it, as it supports a vast range of codecs. Given the cryptic nature of the string, it