Thanks great to know!Hey they emailed back:
Thank you for your interest in the UCLA School of Theater, Film, and Television. Yes, you can upload the document in the supporting documents portion of the app. You can also indicate in the text box that you will be uploading it there.
So I guess if your SOP is longer than 500 words we can submit it as a supporting document
I was planning on editing mine to fit under 500 words, but it was 2 pages (double space already).