Can hear audio but not see video in iMovie

have a project in iMovie and when I click on the space bar I can hear the audio, but the video remains black even though the thumbnails show images.  Am I missing a setting somewhere?

You cant directly add the video object to the stage
to add it on the stage add UIComponent to stage and add the video object to it
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#FFFFFF, #FFFFFF]" width="468" height="390" initialize="startup()" >
    <mx:Script>
        <![CDATA[
            private function startup():void {
                var nc:NetConnection = new NetConnection();
                nc.connect(null);
                var ns:NetStream = new NetStream(nc);
                ns.play("../Assets/Video/me.flv");
                var vid:Video = new Video();
                vid.attachNetStream(ns);
               display.addChild(vid);
        ]]>
    </mx:Script>
   <mx:UIComponent id="display"/>
</mx:Application>
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