It's a two and a half hour long fan-edit of both of Ridley Scott's disappointments: 'Prometheus' and 'Covenant'. The first one tapped into the 'Ancient Aliens' hype as peddled by the History Channel and the second doubled down on this cringe, driving a stake through the Aliens franchise altogether.
The fan-edit is a more clinical/documentary style adaptation of the available footage (including bonus material). It follows the synthetic 'David' and explores his motivations and character arc more fully. It removes much of the cringe, but does not manage to excise all the Hollywoke stupidity. E.g. the study of micro-organisms was apparently never developed in this universe, explaining the complete and absolute stupidity of the characters in removing their protective suits in a xeno-biological environment or never bothering to put them on in the first place (as is the case in the second movie).
It was definitely a good attempt and it even gave off vibes of the original 'Alien' movie, but it also had a lot of smaller narrative plot holes. But all things considered, it was still better than the original.
Looking up his search terms gave me this result.
That seems to be part of this larger site, which has forums:
There's also a reddit group but who wants to go there?
I tried searching fanedit db for the other edits mentioned here. Strangely I don't see The Hobbit "Tolkien Cut" there, I did find the Spicediver edit of Dune.
Of course they don't host any of the files but you can easily find them or others once you know the fanedit name or name of the editor.
Thanks for this, I'll look more into it later.