1080P高清
http://movietrailers.apple.com/movies/dreamworks/transformers/transformers-tlr4_h1080p.mov
720P高清
http://movietrailers.apple.com/movies/dreamworks/transformers/transformers-tlr4_h720p.mov
480P高清
http://movietrailers.apple.com/movies/dreamworks/transformers/transformers-tlr4_h480p.mov
高清晰版
http://movietrailers.apple.com/movies/dreamworks/transformers/transformers-tlr4_h640w.mov