: It could be a specific digitized record from a media archive, such as the Internet Archive's Motion Picture News collections .

: Such as the Alden Research Laboratory or historical geological findings by Alden (1905/1918) .

: In some specialized niches, codes like "ALDN" are used by content creators or software companies for version control or internal project tracking. Recommended Steps for Clarification

: A specific scene or trailer from a film production or marketing campaign.

Could you provide any on where you encountered this file name or what industry it pertains to?

Based on current data patterns, "ALDN-105.mp4" most likely represents one of the following: