However, he has set up a website dedicated to solving the mystery. This has involved compiling a database of videos to make them more easily searchable than via YouTube itself. And, a handful of Redditors have offered to help transcribe any verbal content that can be heard in the hope that analysing the data could unearth some meaningful patterns.

At present, there’s no clarity at all on what’s going on – but that hasn’t stopped people wondering. The theories range from Unfavorable Semicircle being another test channel to the “work of a disturbed mind” – and even a kind of numbers station. Numbers stations make seemingly nonsensical radio broadcasts that are actually coded messages and have been used since World War One. Efforts to “decode” the videos have ranged from attempts at analysing the dot constellations to questioning the use of the Sagittarius symbol in video titles. All the while, more keep getting uploaded – at a rate of about two every minute.

Neither Sweep nor its_safer_indoors have pinned down a theory that satisfies them completely. Sweep says he’s leaning towards the videos being the output of a bot, perhaps performing some strange kind of test, whereas its_safer_indoors thinks they could form an “elaborate puzzle”. But neither can be sure.