Responsive video embed
/* Responsive Vimeo Iframe */
.embed-container {
position: relative;
padding-bottom: 56.25%;
height: 0;
overflow: hidden;
max-width: 100%;
iframe,
object,
embed {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
}
<div class="embed-container">
<iframe src='http://player.vimeo.com/video/VIDEO_ID_HERE' frameborder='0' webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>
</div>