video.js: Change Video Source - From http://docs.videojs.com/docs/api/player.html#Methodsposter
myPlayer.src([
{ type: "video/mp4", src: "http://www.example.com/path/to/video.mp4" },
{ type: "video/webm", src: "http://www.example.com/path/to/video.webm" },
{ type: "video/ogg", src: "http://www.example.com/path/to/video.ogv" }
]);