My favorites (includes mentioned channels on this thread) (not in order)
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PixelTail Games (that’s why I’m here)
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jacksepticeye (My favorite channel, he screams a LOT, he plays video games, and does occasional vlogs. (his hair is green because he dyed it.)
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Markiplier (My second favorite, he used to upload gaming and vlogs daily, but he’s currently taking a break due to the loss of one of his friends, who attempted suicide, but the doctors decided the brain damage was so bad they had to take him off life support.)
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Vanoss Gaming (Vanoss and a group of other people play games together and he sometimes posts animations people made for them.)
More favorites!
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OfficialNerdCubed (he does gaming, sometimes with his dad.)
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Riskrim (He used to only do FNaF, but a few months ago he decided not to make videos of it if it isn’t important. He now does almost every game thinkable.)
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brutalmoose (He reviews games that are horrible and you probably never heard of them. Oh yeah, he’s hilarious.)
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Caddicarus (He’s funny, reviews games worse than the ones brutalmoose plays, and is british.)
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DidYouKnowGaming? (A popular-ish youtuber (Markiplier was in a TF2 episode, and so on) talks about the facts about a video game that you might have not known.)
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Cat CATastrophes (Cats, cats EVERYWHERE.)
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Good Mythical Morning (2 people, Rhett and Link, post videos of them doing random things, posted morning time in North Carolina every week day.)
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Danny2462 (He does videos of him playing Kerbal Space Program and he’s hilarious.)
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Ashens and extraashens (He reviews knock-offs of video games, toys, and consoles, does Christmas month daily videos on extraashens each year, eats 40 year old food, and he’s british.)
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Vsauce 1 2 and 3 (the Vsauces talk about theories, video games, and what’s trending on the internet.)
I still have about 40 to go now. 
HIM…