In certain video game lore (like SCP Foundation or Roblox horror games), files are often named with prefixes like BANK followed by a number.
There is currently no widely known internet mystery, horror series, or viral video specifically titled BANK-105.mp4
There are many fan-made "MP4" files within the Analog Horror community, often using generic names like FILE-105 or REC-105 . In certain video game lore (like SCP Foundation
It is possible that this is a private file, a very recent upload from a niche Analog Horror series, or a reference to a specific bank transaction or data file. However, if you are looking for a "deep post" analysis, it might be related to one of these similar sounding mysteries: BANK-105.mp4