While there are many "creepy" lost media files (like "lolsuperman" or the "mother8538" videos), there is no verified record of a video titled "g536.mp4" gaining notoriety.
[Fully Lost] Supposedly YouTube’s Most Creepiest Video : r/lostmedia g536.mp4
: Refers to the Heckler & Koch G36 , a German assault rifle often featured in tactical shooters like the Battlefield series . Lost Media and Urban Legends While there are many "creepy" lost media files