A Content Delivery Network (CDN) offers several advantages over a plain webserver for streaming video. For example, a CDN will be able to speedily deliver your videos across the country and globe, it will be able to stream your videos instead of a download and it will be able to scale to large numbers of videos and viewers.
<script type="text/javascript" src="player.js"></script>
<div id="container">Loading the player ...</div>
<script type="text/javascript">
jwplayer("container").setup({
flashplayer: "player.swf",
file: "your file.mp4",
height: 315,
provider: "rtmp",
streamer: "rtmp://sXXXXXXX.cloudfront.net/cfx/st",
width: 420,
'image': 'your-screenshot.JPG'
});
</script>