PUNISHMENT PARK available on YouTube in its entirety
Not sure if it was posted legally, but it may very well have been. Other groundbreaking films by Peter Watkins—PRIVELEGE and THE WAR GAME are also there for the viewing, plus interviews with Watkins himself (all presumably taken from the DVDs people keep mentioning here). PUNISHMENT PARK is presented in 10 parts. Thirty six years and still potent. Very much worth seeing.
Enjoy...
http://www.youtube.com/profile_videos?user=SomeTwit