He uses it for photographic reasons, i don't know what it's called "Fire cloth" that's the problem. I can't find much mention of it outside of his video. I don't think it's actually fire retardant or anything like that.
He uses it for creative shots, and since my focus these days is artistic photography, I wanted to get something like this, as I already had some ideas for sheer material.
But I'm having a bugger of a time finding some stuff here in Korea, but I can order from the US pretty easy, so I thought I'd check if anyone knew of any online shops selling the stuff, I could order the colors I need and get it, but although it's "Famous" in the netherlands, it doesn't seem to appear anywhere else. You can click the link above to see some other examples
Just found a google+ frank made calling it "organza"