Real controversies and conspiracies, and well-documented crimes committed by a government whether in the present or the past.
Source: Youtube.com
A snippet was in Zeitgeist Addendum: Youtube.com
First film remastered: Moddb.com
More information on the zeitgeist movies can be found here:
Thezeitgeistmovement.com
Zeitgeistmovie.com
Thevenusproject.com