The video looks tailor-made for IMAX 3D viewing.. too bad the uploaded version is a lowly 360p. A 1080p HD version of this seen on a big screen would be amazing.
While it is a beautiful work of art I think the entire piece is CGI. First indicator to me was the people waving on the arm of the Statue of Liberty. Some of the other scenes looked familiar to scenes I have seen in movies.