Its javascript embedded inside the swf file... Its a custom video player

Easiest way is to decompile the swf file and find out how they did it..

Code: 
<script type="text/javascript"> 
function showIt() { 
  document.getElementById("hid").style.visibility = "visible"; 
} 
//setTimeout("showIt()", 10000); // after 1 sec 


</script>