Wrap iFrame within Image
modified version of the following JS fiddle -- http://jsfiddle.net/Masau/7WRHM/
by gjpgjp
HTML
<div class="wrapper">
<div class="h_iframe">
<!-- a transparent image is preferable -->
<img class="ratio" src="https://my.matterport.com/show/?m=jQptsFxRat8"/>
<iframe frameborder='0' height='465px' width='470px' scrolling='no' src='https://my.matterport.com/show/?m=jQptsFxRat8' frameborder="0" allowfullscreen></iframe>
</div>
</div>
CSS
.wrapper {width:100%;height:100%;margin:0 auto;background:#ffffff}
.h_iframe {position:relative;}
.h_iframe .ratio {display:block;width:100%;height:auto;}
.h_iframe iframe {position:absolute;top:0;left:0;width:100%; height:100%;}