Medium Cool is legendary for a reason. Haskell Wexler used documentary techniques to tell a fictional story, and knew where to go and what to do with the camera. He may not have been able to predict just how crazy it would get in Chicago in August of 1968, but he knew it was a place to be, and that something could happen.
Robert Forster plays a news cameraperson, John Cassellis, who ends up on the streets of Chicago and learns something about how the people on those streets perceive the work he and his fellow journalists do. Part of him maintains a distance from the story, but he's too smart to avoid some of the implications. It's a key moment for John when he finds out his network lets the cops and the FBI see his footage.
Meanwhile, the entire Medium Cool project confronts the boundaries between fiction and documentary. Verna Bloom, a professional actor from New England in her first movie, is so convincing as a woman who has moved to Chicago from West Virginia that some people thought she was an amateur. Bloom has talked about the odd dual nature of her performance ... Wexler had her walking around during the police riots on the streets, and Bloom is both doing her job as an actor and experiencing the violence in reality. It is these documentary-style scenes that lift Medium Cool above the norm, as the plot is serviceable but no more, and some of the larger political points are muddled. But as the riots take hold, Medium Cool is gripping in ways that surpass the usual film.
The ending is weak ... it feels out of place, like something out of a more traditional Hollywood movie. But the last shot, of Wexler pointing a camera at us as the crowd chants "The whole world's watching!" is the perfect summation.