#productYouTube {
position: relative; 
padding-bottom: 56.25%;
height: 0; 
overflow: hidden;
max-width: 100%;
}

#productYouTube iframe, #productYouTube object, #productYouTube embed {
position: absolute;
top: 0;
left: 0; 
width: 100%; 
height: 100%;
}