Youtubers?! We don't want your kind around here.
Pretty damn epic, even though I don't know half of those people.
Great use of the music. I like that you synced the hits up with the music.
Little criticism: I felt that the little orange "hit" fx might be a bit too static and not give that much impact, because it's just the same graphic reused. Right now it looks like it's going "wooooosh..." instead of "WAM".
You have to lower your audio a bit so it doesn't clip (crackle and distort) or maybe that's just the song that you used.
Also, the titles and fonts looked a bit amateurish, I know it's not that big of a deal, but it will make the whole animation just look that little bit more polished.