Well the very intro of the video explains everything, he's played SS2 once recently without looking into its community and played Prey three times while immersing into its community, so he thinks that Prey invented gameplay with enough freedom to do no-XP runs or other limited runs because it has achievements for them, that's not the only feature that SS2 had 18 years ago, he also praises the XP acquisition system which is almost identical to SS2's and another of its innovations from 18 years ago, the similarity goes all the way down to the upgrade system having visual motifs of eye slots and needles associated with it.
He complains at some point that difficulty doesn't change much in Prey and it's mostly monster damage and health, well he's right about that, SS2 changes everything with difficulty even in vanilla, replicator prices, loot drops, the prices for upgrading your abilities, your maximum psi points for casting psi abilities, it goes way beyond damage dealt.
No mentions of how Prey takes a page directly from Bioshock's book and prevents you from having any build freedom at the very beginning, making it so you have to go through a long sequence where you only have 1-2 weapons before you start getting some freedom and can decide to specialize in either weapons or psi/plasmids, Prey does it a little better by letting you get passive abilities relatively early on but still delays the Psi significantly because it needs to follow the Bioshock holy book of introducing new gameplay elements with wide spacing between them so that even beginner players can adjust from the very first run through the game, even if that means turning the first quarter or third of a game into a tutorial. But the guy doesn't seem to notice this problem and that it's not present in SS2.
He does notice that the game needs more monsters, weapons, and ways to do damage so that there's more specialization, things which are in SS2.
Another thing he notices is how weird the combat is, with the flickering effect (I think that's the phantom's spooky light flickering effect which is bugging out) and the bad repetitive combat music, where SS2's was at least decent and in some levels was a dynamic part of the level's soundtrack.
There's more but I don't think I really need to go on, the verdict that Prey beats SS2 just isn't believable since there's too many aspects where SS2 tops it, if something is going to beat SS2 at being SS2 it's most likely going to be SS3 if they don't screw it up.