<script src="/JWPLAYER/jwplayer.js"></script>

<div id="mediaspace2">test</div>

<script>

jwplayer("mediaspace2").setup({

flashplayer: "/jwplayer/jwplayer.flash.swf",

file: "rtmp://주소/mp4파일.mp4", 

height: 406,

width: 720

});

</script>

rtmp도 되고, http도 되고