Displaying a YouTube video with iframe full width of page

HTML

<div class="videoWrapper"> 
<iframe src="http://www.youtube.com/embed/mC-zw0zCCtg" width="560" height="349">
</iframe>
</div>

CSS

.videoWrapper {
position: relative;
padding-bottom: 56.25%; /* 16:9 */
padding-top: 25px;
height: 0;
}
.videoWrapper iframe {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}