body {
     margin: 0;
 }
 
 .container {
     margin: 0 auto;
     width: 100%;
     max-width: 750px;
 }
 
 img {
     width: 100%;
     vertical-align: bottom;
     display: block;
 }
 
 .youtube {
     position: relative;
     width: 95%;
     margin: 0 auto;
 }
 
 .youtube:before {
     content: "";
     display: block;
     padding-top: 56%;
 }
 
 .youtube iframe {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
 }
 
 .url {
     position: relative;
     width: 100%;
     margin: 0 auto;
 }
 
 .video {
     position: relative;
     width: 95%;
     margin: 0 auto;
 }
 
 .video:before {
     content: "";
     display: block;
     padding-top: 56%;
 }
 
 .video iframe {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
 }