jwplayer("myElement").setup({
playlist: [{
image: "/assets/sintel.jpg",
file: "/assets/sintel.mp4",
title: "Sintel Movie Trailer"
}, {
image: "/assets/bunny.jpg",
file: "/assets/bunny.mp4",
title: "Big Buck Bunny Movie Trailer"
}, {
image: "/assets/xyz.jpg",
file: "/assets/xyz.mp4",
title: "test xyz video."
}, {
image: "/assets/abc.jpg",
file: "/assets/abc.mp4",
title: "abc video."
}, {
image: "/assets/tuv.jpg",
file: "/assets/tuv.mp4",
title: "TUV video"
}]
}).playlistItem(2).stop(); // index of the video
Found at http://www.longtailvideo.com/support/jw-player/28851/javascript-api-reference/