For 'Zeitgeist: The Movie (2007)' and 'Zeitgeist: ADDENDUM (2008)', identify all digital platforms where they can be streamed or rented. Also, determine if a free companion source guide is available for each film and where to find it, and specify where their official soundtracks are available.
Navigate to the 'Watch' page on zeitgeistmovie.com. For 'Zeitgeist: The Movie (2007)', identify all listed streaming/rental platforms. For 'Zeitgeist: The Movie (2007)', determine if a free companion source guide is available and its location. For 'Zeitgeist: The Movie (2007)', identify where the official soundtrack is available. For 'Zeitgeist: ADDENDUM (2008)', identify all listed streaming/rental platforms. For 'Zeitgeist: ADDENDUM (2008)', determine if a free companion source guide is available. For 'Zeitgeist: ADDENDUM (2008)', identify where the official soundtrack is available. Compile all gathered information into a concise answer.
List Amazon US, Google Play, Tubi, iTunes, Apple TV, and YouTube as platforms for 'Zeitgeist: The Movie (2007)'. List Vudu, Amazon, Google Play, Tubi, iTunes, Apple TV, Vimeo, and YouTube as platforms for 'Zeitgeist: ADDENDUM (2008)'. State that a free Companion Source Guide book is available for 'Zeitgeist: The Movie (2007)' and can be found 'HERE'. State that no free Companion Source Guide is explicitly mentioned for 'Zeitgeist: ADDENDUM (2008)' on this page. State that the official soundtrack for 'Zeitgeist: The Movie (2007)' is available via iTunes. State that the official soundtrack for 'Zeitgeist: ADDENDUM (2008)' is also available via iTunes.