#presentation-section{
	margin: 10px 20px 20px 20px;
}

#presentation-section .header{
	color: #0084bf
}

.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%;
}

/* @-moz-document url-prefix() { 
  #presentation-section {
	    	.videoWrapper {
	    		height: 280px;
	    	}
  		}
} */