Projecting snowfall on the walls

I am tasked with making it snow in our sanctuary this Christmas. I’ve got a couple different ideas, but I’m not sure if I can actually implement any of them.

I would rather have some digital snow rather than having a bunch of paper or soap chips to clean up. So I think projecting video on the walls might have a really cool effect.

Of course these guys are the professionals, and they use projectors worth thousands of dollars. But I can try, can’t I?