>>324324691
they're highly active now it seems. 
also you can just upload from unity anything you want. 
one of the dev leads is using a derpy miiko apparently 
it's all built in typescript and javascript, it's open source, supports video players, is self hosted. 

But the thing that got me a bit buzzed is that it basically got all of High Fidelity's code - which was actually very, very good. They just came out too early.