Hmm, let me go through my YouTube subscription list and see which gaming commentators I'd actually recommend. Huh, seems it in alphabetical order, so that's how I'll list them.
Angry Joe: I don't actually agree with him in terms of taste in games all that often, but the thing I like about him is that when he reviews a game, I know exactly why he did or didn't like a game, and why I might or might not like it myself.
ChaosD1: Almost exclusively focuses on MMOs, so most of his content doesn't actually interest me much, but he does have just about the best voice on YouTube.
AVGN: The oldest of the old school, I guess. Not to be taken seriously.
Core-A Gaming: Very intelligent, deep but succinct videos mostly about the fighting game community.
Digital Foundry: Largely about hardware, but they do often put out some pretty decent retrospectives.
hbomberguy: One of the funniest, most insightful and downright awesome YouTubers. I wish he'd make more videos, and games don't actually feature in a lot of them, but I have to recommend him. He reminds me a lot of Charlie Brooker, and for me that is very high praise indeed.
Ian Danskin (aka Innuendo Studios): Ha... actually, most people on this forum will despise his politics. Oh well.
Joseph Anderson: Makes 3+ hour long videos on games... and I enjoy watching every minute.
Kim Justice: Makes some of the best, most in depth videos about games I've ever seen. Also has easily the fewest subscribers of anyone mentioned so far. Subscribe NOW.
LGR (Lazy Game Reviews): Great range of videos on retro gaming.
Mark Brown: Great videos about elements of game design. As a wannabe game designer, this is of particular interest to me.
Noah Caldwell-Gervais: Truly awesome, in depth videos, presented in a thoughtful, occasionally downright poetic way.
Noclip: Fascinating interviews with game developers.
Raycevick: Already mentioned here. Good, in depth videos.
Shammy: Incredibly amusing reviews. For me, he walks the line of humour and cynicism better than almost anyone. Like an American, slightly cruder hbomberguy.
Well, having listed all of those people and thought about it a bit, I really have to say the best of the bunch is Kim Justice, and not just because I think she deserves more subs. In terms of production values her videos are, I'd have to say, technically amongst the most amateurish out of everyone I've listed, but in terms of depth and breadth they are truly epic. Her multi-part series on Peter Molyneux is easily the best, most even-handed, most interesting and most insightful portrait of an incredibly controversial figure in gaming. She's done extensive videos on many, many developers and game series from throughout the entire history of gaming. The amount of effort she puts into the research alone is astounding. Seriously, check out this channel now.
Sadly, quite a few people reading this won't bother, because a transgender gaming commentator might be a bit too much for them to handle. Their loss, really.