That is a shockingly good analysis, damn.

Only possible thing I could maybe add or tweak would be... expand 'hypemen' a bit more to include... well, at least an attempt at some kind of comedy.

Maybe split this off into its own group?

A lot of earlier gaming youtubers... at least seemed to be trying to more or less do live playthroughs or after playthrough reviews that... basically just tried to either ad lib, or write a script with as many relevant jokes a possible.

I keep emphasizing 'tried to' and 'attempted' because many of these schticks just... sucked, lol, or quickly fell apart into a depressing cynicism spiral.

Granted, you seem to be focusing mostly on live streamers, specifically lets players, as opposed to the older, sort of gen 1 of youtube video game content people, where a lot of it was just... i dunno man, i just recorded myself playing a game, shrug.

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Also, at this point, there may be at least two other distinct kinds of... video content about playing games, types of people, excluding esports amd speedrunners, but nvm anyway:

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Roleplayers.

There are a lot of streamers that just pick some roleplayable game or roleplay mod or whatever of a game, and I think that's ... kinda its whole own thing, where a lot of the content/style is ... i dunno, you could call it maybe a real time soap opera generator, a number of these people will actually learn or construct a whole fleshed out voice and personality for their character... but also a lot of roleplayers will more or less just basically be asshole trolls/bullies.

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'I am bad at games but cute'

Many vtubers, pickmes, also not pickmes but actually interested in games, but also very unfamiliar with them.

This is a whole other style or genre, where the appeal comes from... well, theoretically it could include other extremely naive / inexperienced noobie video gamers, but realistically, its mostly the appeal of viewers parasocially having a mostly submissive but also earnest psuedo girlfriend.

Probably worth noting that this can be a consistent schtick, or can... often evolve into 'hype(wo)man' or 'tryhard'.

This is imo distinct from just being cute and also being any other kind of streamer... because the ditzy cute naiveity is strongly emphasized, often to a ludicrous degree, as well as the lack of skill and amount of unforced errors... and this is the whole point, to evoke sympathy.

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Also, now that I think of it, this could maybe qualify as distinct:

Meme/Joke/Ludicrous self imposed goals or restrictions video game player.

The whole concept of this is to basically attempt to do something completely absurd in a game, to play the game 'wrong' in a way that is at least in broad concept, humorous on its face by how ridiculous it is.

Like uh i dunno... play through RDR2 but you have to never use a horse, ever, or play through Morrowind without ever increasing any of your stats, naked playthroughs of Dark Souls, aim for some nonsense/meme strategy in Hoi4, play competetive Madden or Fifa where your entire team is 4' 6" and weighs 600lbs, kill yourself as fast as possible in a game that is designes for that to not be able to happen, win a racing game going entirely in reverse the whole time...

Just wacky zany shit.

Usually this translates better to a youtube format thats cut down from a livestream, but those livestreams can get decent numbers as well, and you can also tie in your viewers to the whole thing, maybe they get to decide some new absurd task or make some decision for you at some point.