This isn't exactly mmd, but I'm having a hard time finding sauce on the non-mmd sections of these shameless compilations:
https://www.youtube.com/watch?v=9GE6kW6Wx8s(in between the mmds)
https://www.youtube.com/watch?v=vHcH07ElEZI(near the end)
The models make me think they are taken from some korean mmo, and I'm not too familiar with those. I have no knowledge about this kind of stuff, but if I had to guess I'd say these were rendered using an external program and not ingame. The physics seem too good.
On an unrelated note, someone was looking for this last thread. I happened to grab it before it was taken down. I think the creator uploaded a very similar version anyways thats still up, so whatever.
https://drive.google.com/open?id=0B8xze7gISIUSR1FRaHhpT3h1UkU 