all shall perish –
this is the most upsetting thing I’ve seen
in a while
First a minor point: there are certain very deep tones that cause unease in people. Some are actually lower than the range of human hearing. Most places that are “haunted” and produce unease do so because they have these low rumbles causing people to feel creeped out. This has that in the audio lower portion of the audio as well as other effects visual and auditory to make you feel uneasy.
The major one is that creepiness comes from a feeling that you are uncertain whether or not there is a threat and what the nature of the threat might be. The cat is edited to be behaving in a rapid erratic way that seems unnatural. It’s not clear whether there is danger but the erratic movement seems artificial and off putting. In addition, the cat’s vision moves towards the viewer as the video goes on, increasing the feeling that there is danger. The direction that eyes point is something deep in our brains – we can tell what something is looking at very easily and we know when we are being looked at. Typically videos avoid having the subject look directly into the camera because this is so distracting… but here it’s used to make us feel in danger.
Finally, the cat taking a step right before the video ends is similar to the “perfectly cut scream” effect where cutting an emotional response without resolution helps keep you in that emotional state. If it held on the cat it would just look like a cat walking, but the cat (which we perceive as perhaps a stationary robot) takes a step implying threat and the video cuts before we get the resolution that this is just a cat with some stuttery editing.