Psywar (from Psychological Warfare) is an interesting documentary about propaganda by Scott Noble (via Metanoia). It touches on historical elements with regards to PR, Edward Bernays, media, war, politics and democracy, as similarly presented in Adam Curtis’ The Century of the Self or Manufacturing Consent with Noam Chomsky.
Speakers that are featured include Chomsky, Howard Zinn (historian), Sharon Smith (historian), John Stauber (PR Watch), Peter Phillips (Project Censored), Richard Conniff (A Natural History of the Rich), Graeme MacQueen (Center for Peace Studies), Christopher Simpson (The Science of Coercion), Morris Berman (Dark Ages America), Michael Parenti (historian), William I. Robinson (Critical Globalization Studies), John Manley (historian), Peter Linebaugh (historian), Stephen M. Sachs (Remembering the Circle), and Sut Jhally (Media Education Foundation).
Vimeo has a trailer video to offer an impression.
For a more recent use of propaganda see an article by Rolling Stone: Another Runaway General: Army Deploys Psy-Ops on U.S. Senators.