Membuat Posting Iframe Responsive

 <style>
.iframepost {
  position: relative;
  padding-bottom: 10.25%;
  overflow: hidden;
}

.iframepost iframe {

  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border:0;
}

</style>

<div class="iframepost">

<iframe allowfullscreen="" frameborder="0" height="315" src="*********?si=gFhjsomI1YNdrEvR" width="560"></iframe>

</div>