It's not edgy, it was a question. I skimmed through the video and saw some dudes arguing and getting slapped in the head
I sort of assumed you'd have watched it before asking.
Basically it's two shirtless dudes wrestling on the ground, another guy shows up and helps the winning one by kicking the other guy, a while later they get into an argument with some passer-by, they slap him around a bit and he runs away. At some point the smaller guy who isn't shirtless starts carrying around a halfbrick and the original guy they were beating on escapes as well. Then they get in an argument yet another passer-buy and the smaller yob throws the brick at his head, knocking him out cold instantly. Everyone suddenly realizes this is very bad, the one who threw the brick runs away, and the others just spend some time freaking out. Then one woman starts trying to help the man, but says something to the shirtless guy that makes him kick her in the face, also instantly unconscious. Finally after freaking out for a bit more he tries to give some half-assed CPR to the dead/dying man together with some other guy.
From the looks of it just extreme drunken, violent stupidity at work.