I'm subbed to a lot of youtube channels. I'll go through my subscriptions and list the gaming ones. I'll skip most of the really famous ones like Angry Joe, Cinemassacre etc.
Accursed Farms - Does a good series reviewing old games called Ross' game dungeon. Very worth watching.
AJ Pickett - DnD lore. Decent quality.
Arcane Agent - Apparently does Pathfinder Kingmaker builds guides. Haven't watched this one in ages and don't remember subbing.
Ars Technica - Short interviews with devs of classic games.
Call Me Kevin - Harmless light entertainment. Does LPs just messing around in games. Daily uploader so quality isn't the best but it's something to watch.
Civvie 11 - Has his own Codex thread. Does reviews and edited LPs of old shooters. Pretty consistent quality.
Click4Gameplay - Fan of open world ARPGs. Big Outward fanboy. Also does Codex style pontificating on RPG design philosophy.
decino - Plays ultra hard custom Doom maps. Good in small doses but not really bingeable.
Dm It All - Discusses DnD modules and DnD history.
GamerZakh - Demos games (wouldn't really call them reviews). Not bad. Uploads every couple days so vids are kinda low effort but he seems like a nice guy.
General Sam - Jew who plays shooters and banters with his mates. Can be very funny. Has a podcast too which was funny when he did solo recordings (basically standup but good) but now sucks horribly that he has his fellow streamers on as guests.
GmanLives - Game reviewer. Mixed genres. Videos are short enough to be watchable.
Hype Break - Mainstream gaming news if you give a shit.
ICURUSLIV3S - Doom mods.
Larry Bundy Jr - Gaming history. Mostly classic console games. His production quality is good and he's and entertaining guy.
Let's Game It Out - Edited LP's. Mostly of survival/building type games. Spends crazy amounts of time breaking the game in inventive ways. Mixed quality but he's hilarious at his best.
Luetin09 - Extremely passionate but boring WH40k lore channel. May be the most autistic youtuber. Can frequently takes more than 30 minutes to reach the topic of his video. I use his videos to fall asleep with great success (not joking).
Majorkill - Actually good 40k lore channel. Much more reasonable video length than Luetin. Pretty dumb sense of humor but he cracks me up sometimes anyway.
Many A True Nerd - Inoffensive British normie who does minimally edited long form LPs. Good one to fall asleep to or watch as background noise. Actually quite entertaining in spite of the video format.
MetalGearGlenn - Short game reviews by a British guy with a funny accent.
Micky D - Short form LP vids by an Irishman with a funny accent.
minimme - Mid length reviews of shovelware games. Doesn't come up in my recommended much but the few vids I've seen are good.
Neckbeardia - Nice Irish married couple who read made up DnD stories and fanfics from 4chan. It's more enjoyable than it sounds.
Nerrel - Mid length gaming commentary and review videos.
No Strings Prd - Command and Conquer lore channel. What the fuck? Why did I sub to this?
Nostalgia Nerd - Old computers and old games.
Pixelmusement - Old DOS games!
Play on Tabletop - Does a good series called 40k in 40 minutes. It's an edited video of a WH40k game.
ProbablyJacob - Pretty entertaining game reviewer. Covers a few RPGs.
Rahn - Makes abstract art films using footage and sound effects from Deus Ex. Latest video wasn't amazing but I'm just glad he's back. Best channel on YouTube.
Seth Skorkosky - DnD module reviews and RPG philosophy videos. Very smart guy with good production values.
Slope's Game Room - Covers gaming topics and scams on kickstarter. Good writing and editing. Sounds exactly like Larry Bundy Jr and has similar interests to him as well...
SplatterCatGaming - Unedited 30 minute gameplay demos of mostly indie games. Entertaining guy with a boring video format, but he's a daily uploader so he stays very current.
SsethTzeentach - Jewish guy who does reviews of old games. Probably too Codex famous for this list. Funny guy and a must watch.
Strat-Edgy Productions - Talks about old games. Very RPG focused. A bit messed up and talks about injects his personal history into reviews at inappropriate times. His game reviews often sound like a cry for help/recognition.
Tehsnakerer - Subbed to this guy after watching his feature length E.V.O. edited LP/review. Epic vid. Haven't checked out his other stuff yet but watch that one.
The Golden Buddah - Reads fake DnD stories from reddit. Light entertainment.
The Salt Factory - Feature length game reviews. I must have used this channel to fall asleep once because I can't figure out why the fuck else I would have watched a 3.5 hour KOTOR 2 review.
TheLazyPeon - Reviews MMOs. I don't care about MMOs but he's a positive guy and an entertaining watch.
tomatoanus - Does videos explaining speedrunning history and techniques to non speedrunners. It's car crash viewing, witnessing the ingenuity and utter uselessness of it all. This channel speaks volumes about about the wasted inventive genius of a generation of lost white men.
Viva La Dirt League - Mildly amusing skits about gaming related themes. Very SFW.