.video-container {
position: relative;
padding-bottom: 56.25%;
padding-top: 30px; /* not required for Facebook */
height: 0;
overflow: hidden;
}
 
.video-container iframe,
.video-container object,
.video-container embed {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}

#videobox {
	max-width: 800px;
	margin: 30px auto;
}

@media (max-width: 760px) {
	#videobox {
		margin: 20px;
	}
}