First the thing was bitching about them popping a baloon in its ear. Then it bitched about how its friends brought over people it didn't invite and how it couldn't have too many people in its aparment. Then its about 10 minutes solid of the other people saying "it" wasn't prepared for the event and they were trying to help. There's nothing too juicy, but I think the funny voice and overall asinine argument is pretty engaging.
Don't forget the guy in the background on his computer being nonreactive through the whole thing. Plus one person starting to cry while the argument is going on.
More importantly, it's a bunch of 2-dimensional cardboard cutout characters that the girls can project whatever the hell they want onto. And then cosplay as and use it as an excuse for their character to be paired with whatever other 2-dimensional character they project their wants onto. I'm not exaggerating when I say I've seen entire packs of girls in Hetalia costumes effectively chasing dry-humping one another.
Okay, I know Hetalia, looked up Hetalia Day...it looks like just a lot of cosplayers getting together. So weapons have to be peace-bound and...decorations put up and taken down? Fucking seriously? These people couldn't organize shitting in a toilet.
I blame the anime for creating the fandom, drawing these people into a critical mass where socially backward behavior is not only tolerated but encouraged.
The cosplay's just an extension of that, though past social psychology work on the effect of costumes and masks on peoples' inhibitions probably factors into the stupidity as well.
And this isn't a hate-on against anime or cosplay - I cosplay and I attend and/or staff multiple anime conventions a year.