Filenames like "N5-C@lh0unS&Dyl@nR.mp4" are frequently used in online "true crime" communities or on file-sharing sites to:

The "Calhoun" reference usually points to specific recordings made weeks before the attack.

Footage released by authorities in 2003 shows the pair firing illegal sawed-off shotguns and rifles at trees and bowling pins, often joking about the lethality of their weapons.

Platforms often automatically flag and remove content related to the shooters; using symbols like "@" or "&" helps avoid detection.

In March 1999, Harris and Klebold visited a wooded area (often identified as Rampart Range or areas near Calhoun) for target practice.