Casually Explained
Underrated channel about a guy who explains stuff (not in the usual way).
Vice
Has great unusual documentaries. Very varied.
iDubbbz,
maxmoefoe
How do I explain lmao. I guess they do stupid shit and it's really entertaining?
Filthy Frank
"Filthy Frank is the embodiment of everything a person should not be. He is anti-PC, anti-social, and anti-couth. He behaves and reacts excessively to everything expressly to highlight the ridiculousness of racism, misogyny, legalism, injustice, ignorance and other social blights". Sounds about right.
Jon Tron Show
Another pretty entertaining skit comedy channel about "reviewing" videos games and movies.
Super Bunnyhop
A channel about talking, analyzing, criticizing video games or it's industry. It may sometimes be serious or funny.
GRSmash
If you love smash brothers and love to see compilation relating to smash, then is is the perfect channel.
EDIT:
You Suck at Cooking.
Yoooooo how could I forget this one.
I used to watch GradeAUnderA, but I found out about some stuff in his subreddit and it gave me a really bad taste. It doesn't seem like he handled his popularity very well, and started becoming nearly what he complains about (relating to drama).