The Vimeo post describes Babylon thus: "A film of sheer sound and fury, the uncompromising subject matter (it all but anticipates the race riots that engulfed inner cities soon after release) and classic reggae soundtrack helped cement Babylon's reputation as one of the most powerful and historically significant documents about the black British experience ever made."
I found the film via Dangerous Minds, which has this (among other things) to say about the film:
"The soundclash scene with Jah Shaka near the film’s end is just a flat-out great piece of film-making...I lived in Brixton in 1983-84 myself...and walked past a couple of outdoor Jah Shaka parties that I
probably would not have been all that welcome at (his PA system was so
loud it felt like the music was thicker than the air, like some kind of dub humidity)... Babylon perfectly evokes the growing racial tensions—and intense
feelings of doom—of inner city London life during the late 70s/early
80s that ultimately culminated in the fiery Brixton riots."