流畅播放
http://player.youku.com/player.php/sid/XNTg5MDk5NTI4/v.swf
1080p高清
http://videos.hd-trailers.net/20130725_gravity_ivegotyoutrailer_4000.mp4
720p高清
http://videos.hd-trailers.net/20130725_gravity_ivegotyoutrailer_3008.mp4
480p高清
http://videos.hd-trailers.net/20130725_gravity_ivegotyoutrailer_1504.mp4