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This almost one-hour documentary, produced in 2011 by GLOKALFILM, approaches the 4 metro, which was built in Budapest between 2006-2014, from a planning, technical and architectural (and not financial or political) point of view. The film has been out on metro4.hu since it was made, but not many people watched it there, and I didn't see it uploaded to YouTube, so I thought I'd upload it.