We watched this in P.S.E at school
Part One
Part Two
It's a video about HIV from about 10 years ago made for schools. They go through a number of scenarios {gay guys, sharing needles ect} and you have to guess which has HIV. At the end of the video you find out that none of the people in the different scenarios have HIV but infact he does!
Btw, it is him and I know that quality is beyond ****.