Even for a twelve-minute horror short, "My House Walk-Through" was one of the most dreadful and terrifying pieces of horror media I've seen yet.
Though it is very silent and not much happens, the ambience makes up for it a LOT.
Basically, the person recording is taking a walk through their house, taking you on a walk-through with them. As the video progresses on, it seems as if they, and you, are trapped in an infinite loop of long hallways and the more hallways the POV goes through, the more disheveled the house gets.
I highly recommend checking it out. It's very experimental, not afraid to do what other movies can't, and honestly, might be one of the scariest things I've seen.
