I watch quite a few youtubers and I like certain aspects of each channel. I don't always share their perspectives but I like that I'm presented multiple things to consider.
For Reviews:
I like FormBx257, HCC788, Half the Battle. I think they stick only to Gi joe (or at least that's the only videos I watch from them).
Formbx257 has a ton of information and I like his overall knowledge (or his research, whichever) and he pays attention to the details. He also appears like a genuine humble guy.
HCC I think has gone undergone some hard times recently and I think he's trying to get back into it but I think he's still hurting. I like that tries to be welcoming and adds some vignettes into his videos.
Timmer is just funny but his video production value is a bit weak or maybe simple is a better word. It doesn't bother me though, I'd guess just making a high end video would take more time and money then he probably wants to invest and if I were him and had the choice between high quality videos or buying more toys, you could expect lower quality videos for the foreseeable future

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For joe dio story videos:
Gi joeburg - Excellent stories and action sequences. They love playing. I like that.
5100 productions - just found them recently. excellent stop motion stories. check them out.
For fixing stuff : Toy Polloi is tops but i also liked the fixes from Retroblasting and Formbx257
Other YouTubers I like but aren't exclusive to Joe (some I've already listed above but I'll put them in again anyways)
Retroblasting, Analog Toys, Spector Creative, Secret Galaxy, GI Dad, Justice Cury, Action Robot Punch, Toy Connections. Toy Tinker Tim. Probably more.
I recommend any of them.