Spike Island
Mancunian inbetweeners tragically fail to see a performance by a popular beat combo. Watchable enough, but I suppose you had to be there.
Power In Our Hands
British Deaf Association archive[1] footage spliced together with interviews and given a civil rights narrative. Well worth watching, though it is a bit of a BDA love-fest. Already being familiar with most of the politics[2], for me it was about seeing the language evolve over the course of a few generations, from furtive, high-baud-rate-low-throughput fingerspelly sign to the evocative BSL we know today. Some thought-provoking stuff on the importance of film/video as a historical record for sign language users.
Made by Deaf people, so lots of refreshingly sensible camerawork and annoying plinky music. In BSL with English subtitles.
ETA: Expanded 'BDA' for clarity.
[1] Read: found in a cupboard.
[2] If you aren't, it's a good introduction.