Some things are custom made, but rails are usually k'nex

He also uses a lot of clear acrylic it looks like for the walls and some floors.

Out and on mobile so can't confirm, but I believe at the end of 2017 closing ceremonies during the credits there is a list of toys manufacturers used.

My son and I just found this series/event and we love it! Hopefully this hasn't been asked (I searched).  I was wondering what products are used to create this event?

Seems like Hubelino Marble Run is used for the solid course but not sure what the rail type product is. I can also see a few K'nex sets for gate triggers.

What products are used to make the Marblelympics happen?