In some internet circles, "IMG_2736.MP4" is associated with "lost media" or "cursed" video tropes.
Right-click the file and go to Properties (Windows) or Get Info (Mac) to see the "Date Created." This will tell you exactly when the video was filmed.
These are usually fan-made horror edits or short clips designed to look like accidental, eerie footage found on an old phone.
Many users search for this specific filename because they have encountered a "File Not Found" or "Codec Error" when trying to play it.
Because "IMG_2736.MP4" is a automatically generated by digital cameras (specifically iPhones and Canon cameras), there isn't one single "official" video with this name. Instead, this filename usually refers to one of several viral videos or specific tech issues that have circulated online. 1. The "Horror" or Viral Creepypasta Context