.container { margin: 20px auto; max-width: 1228px; width:100%; padding:0; box-sizing: border-box; }

.youtubecontent {position: relative; height: 0; overflow: hidden; padding-bottom: 56.25%;}
.youtubecontent iframe, .youtubecontent object, .youtubecontent embed {position: absolute; top: 0; left: 0; width: 100%; height: 100%;}