get url on flash video ends

if you are using the standard flv component you could use this

stop();

import fl.video.*;
vid.addEventListener (VideoEvent.COMPLETE, finishedVid);

function finishedVid(event:Event):void{
navigateToURL(new URLRequest("http://www.whatever.com", "_self");

}

If the video is spread along the timeline, then create an actions layer with a keyframe at the end where the video ends and put the following code there:

stop();

navigateToURL(new URLRequest("http://www.etc...", "_self");