Yeah, Minerva Scientia deleted the original upload of "o weka ala!", so now aside from the clip of it used in Moon Moon's "original songs" version of "kijetesumikyoku", it has become Lost Media™.

about the kigurumi stuff...I hate that.

It's like, I don't want to be freaked out by it, because these are costumes and masks with a high amount of craftsmanship, and they serve a practical purpose of letting anyone cosplay as anything without fear of losing their anonymity or having their faces clash with the costume... But also, the masks don't blink, and it's dead silent except for the audible breathing through the mask. Which is kinda freaky.