Bl - Alex.harper.mp4 File

It might be a fictional "cursed" or "found footage" file name used in a digital horror story or an Unfiction project.

While it is most likely a reference to a story, could you clarify what you're looking for? Are you trying to find the source of this video, or BL - alex.harper.mp4

Because this specific string is quite niche, it could mean a few different things: It might be a fictional "cursed" or "found

It looks like you’re referencing a specific file name——which often appears in the context of internet mysteries, ARGs (Alternate Reality Games), or "lost media" creepypasta stories. ARGs (Alternate Reality Games)