: It may be an internal video asset for a specific organization. For example, "ALDN" is sometimes used as a shorthand for Alden (an engineering laboratory or historical figure) or Booz Allen Hamilton ("BAH" or "ALN" in various internal naming conventions).
: A specific scene or trailer from a film production or marketing campaign. ALDN-105.mp4
Could you provide any on where you encountered this file name or what industry it pertains to? : It may be an internal video asset