It often serves as a prompt for Alternate Reality Games (ARGs), where the audience must decode metadata or hidden frames within the mp4 to find the next part of the story.
Like many "filename-based" myths (such as smile.jpg or * username:666*), resub.mp4 often thrives through: resub.mp4
The implication that watching or downloading the file brings about some form of digital or personal misfortune. It often serves as a prompt for Alternate