.video-container { 
    position: relative; 
    padding-bottom: 56.25%; 
    padding-top: 0px; 
    height: 0; 
    overflow: hidden; 
}

.video-container iframe, .video-container object, .video-container embed 
{ 
   position: absolute; 
   top: 0; 
   left: 0; 
   width: 100%; 
   height: 100%; 
}