One of the sources I plan to reference for an up-coming piece (presently entitled Liberty, Love and Law) isn't widely available on the U.S., but can be found in the bowels of Google's video category.
The Trap: What Happened to Our Dream of Freedom? is a three-part documentary piece by the award-winning film-maker Adam Curtis. Like Curtis' other work (The Century of the Self, The Power of Nightmares – Google video searches also turn up those two) for the BBC, it examines multiple strands of ideas and individuals and how they interfaced over time, and how the impact of those ideas has effected us politically, socially, and otherwise.
Almost all of his work is enjoyable, and includes massive amounts of stock clips from the eras he discusses, along with clips of interviews with those he's discussing or interviews with the individuals if they're still living. The result is a set of spectacular pieces of documentary work, all of which are worth taking a look at. They are “leftist” documentaries, but not on the same level as the work of say... Michael Moore.
Anyhow, the three videos can be found by clicking these three respective links: