USC School of Cinematic Arts Creative Portfolio-Writing Sample

SCA’s deadline (December 1st) is fast approaching and I (as well as many others) am scrambling to put my portfolio together. My question has to do with the format of the writing sample. I’m going with the first prompt:

“A description of a four-minute film that contains no dialogue. It can be fiction or non-fiction. The story has to be communicated visually.”

I personally have no experience writing film description and I cannot find any examples of what they’re looking for online. Does anybody have any advice on how I’m supposed to format this? Or where I’m supposed to start or how they want to be written. Is there specific information that they want included? I just need help, please.

P.S. I’d read somewhere about the school application being due December 1st, but the SlideRoom app not being due until December 7th? Is that true? What’s the deal with that?