1080p高清
http://trailers.apple.com/movies/independent/agentvinod/agentvinod-tlr1_h1080p.mov
720p高清
http://trailers.apple.com/movies/independent/agentvinod/agentvinod-tlr1_h720p.mov
480p高清
http://trailers.apple.com/movies/independent/agentvinod/agentvinod-tlr1_h480p.mov