Liquid Pipe Tutorial Request

Hello

In the new Fortnight trailer on this link:https://www.youtube.com/watch?v=EhpWaXElmcA Could someone from Epic do a tutorial on how they modeled liquid coming out of the pipe at 45 seconds? Was it a cached alembic? Flip-Fluids? MantaFlow? Houdini?

It kind of just looks like a particle system to me?