Thanks, one mystery less. I think I've also heard a sample from it in some pop song (or songs) on the radio. For a track that is quite popular for reusing, it was sure hard to find. Even Shazam couldn't name it, possibly because it's not your usual un-tiss un-tiss clusterfuck of sounds.
Also, I found another mysterious webm in my collection. I do not know what does it reference (and I'm guessing that it doesn't reference a particular work, it just aims to capture the feeling of retrofuturism with tape reels, blinking lights and black-and-green terminal screen, although I'm not 100% sure), and the music track is unidentifiable again (probably self-made?), so if someone has some info on it, it would be nice.