Loaded local video stops play after a few seconds

1

Hello, when I use the following function in my doc class to launch a local video, the video “freezes” after a few seconds. This happens no matter what video I am trying to play.

private function startVideo(e:MouseEvent):void
        {
            var nc:NetConnection = new NetConnection();
            nc.connect(null);
            var ns:NetStream = new NetStream(nc);
            ns.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
            ns.client = this;
            
            ns.play("1280 x 800 Version_1.mp4");
            function asyncErrorHandler(e:AsyncErrorEvent):void
            {
                trace(e.text);
            }
            var vid:Video = new Video(); 
            vid.attachNetStream(ns); 
            vid.width = 1280;
            vid.height = 800;
            vid.x = 1024;
            vid.y = 0;
            addChild(vid);
        }

Any reason why this might be happening? Thankyou.