Leeds Art Uni filmmaking porfolio

Hi, I'm applying to Leeds art for filmmaking but can find very limited sources on specifically Leeds art film-based portfolios, based on other sources, I believe it is appropriate to include any quality film based items, as well as planning and development material, using no more than 15 "pages" (slides for me) that keep below 30 Mb. however I am wondering also if it is appropriate to include creative content that is not based around film such as digital art pieces or adjacent? I have a vague memory of being told to do this at am open day but it very well could have been another uni, but I also have worries that if I get a place at all they may offer me one on a different course because of my more extensive image rather than video portfolio however I'm not sure if I'll get an answer for that on here, anyway i think my main questions for anyone able to answer are:
- What goes into a filmmaking portfolio in general/for Leeds Art
- Should i include non-film related material (my idea around this being to give a more rounded idea of my personal style of work)
Thank you so much for any help anyone can give <3