>>354362756
I searched 'vrchat avatar world' in google between October 1st 2017 and January 28th 2018
Second link was this video https://www.youtube.com/watch?v=ptKBr3kfQ3c&
At 1:42 you can see the black billboard for a split second with some info from the world creator
pic related looked like a name and also seemed familiar to me
putting his name in google + vrchat then confirmed my speculation