Day: October 3, 2017

This solution was pioneered by Thierry Koblentz and presented on A List Apart in 2009: Creating Intrinsic Ratios for Video. With this technique, you wrap the video in another element which has an intrinsic aspect ratio, then absolute position the video within that. That gives us fluid width with a reasonable height we can count on.

.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%;
}