Whole Code:

Add a new video instance to the stage & for this example name it “videoPlayer” without the quotes.

Go to Library


Then


Drag the video from the library onto the stage and give it an instance name of videoPlayer.
Add the code below on that frame.

var nc:NetConnection = new NetConnection();
nc.connect(null);
var ns:NetStream = new NetStream(nc);
videoPlayer.attachVideo(ns);
ns.play(”YOUR FLV FILE LOCATION IN HERE“);
ns.onStatus = function(info) {
if (info.code == “NetStream.Play.Stop”) {
ns.seek(0);
}
};

References:
http://www.tomontheweb.ca/Blog/2006/05/looping-flv.html
http://www.quip.net/blog/2006/flash/how-to-load-external-video