body {text-align: center; padding: 0; margin: 0;}
#container_video {
position: absolute;
width:999px; 
margin-left: -499px; /* moitie de width */
left: 50%;     
height:621px;  
margin-top: -310px;   /* moitie de height */
top: 50%;
background-image:url(http://www.sosve.org/images/prehome/background_spot_tv.gif); background-repeat: no-repeat;
padding-left: 0px;
}

#video_youtube { margin: 180px 250px; width:490px; height:285px; }