.myvideo {
position:relative;
padding-bottom:56.25%;
padding-top:30px;
height:0;
overflow:hidden;
border:1px solid #ccc;
}
.myvideo iframe,.myvideo object,.myvideo embed {
position:absolute;
top:0;
left:0;
width:100%;
height:100%;
}

img {
  display: block;
  height: auto;
  max-width: 100%;
}