Documentaries are a great format for extension 2 english videos! They stand out from pack of narrative shorts and also present a surprisingly broad array of ways to conceptualise your work. Look around on youtube and keep your eye open for SBS and even TVS (Channel 31 UHF) gems.
Recently, this one has particularly struck me
http://www.youtube.com/watch?v=dGCJ46vyR9o
Also if you (or anyone else making a film/video for EXE2, Drama or Art) are interested, I run workshops for this kind of thing. We work on script and storyboard development, planning, casting, all aspects of shooting and editing - also assessments. I have been doing this for quite a while now and have significant experience in this field. There's a lot more information on this site about my workshops if you search around for "cblok". Goodluck, my email is writers_blok_productions@hotmail.com