//www.youtube.com/embed/yCOY82UdFrw
pNDKBrzlsng
<br><div style="position:relative;width:100%;height:0;padding-bottom:56.25%"><iframe src="//www.youtube.com/embed/yCOY82UdFrw" frameborder="0" allowfullscreen style="position:absolute;top:0;left:0;width:100%;height:100%"></iframe></div><br>
================
<div class="container">
<iframe src="//www.youtube.com/embed/yCOY82UdFrw"
frameborder="0" allowfullscreen class="video"></iframe>
</div>
<iframe src="//www.youtube.com/embed/yCOY82UdFrw"
frameborder="0" allowfullscreen class="video"></iframe>
</div>
.container {
position: relative;
width: 100%;
height: 0;
padding-bottom: 56.25%;
}
.video {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
position: relative;
width: 100%;
height: 0;
padding-bottom: 56.25%;
}
.video {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}