Adding a border to an IFrame is no biggie - you do it like this e.g.:
border: 4px solid #000; -moz-border-radius: 15px; border-radius: 15px; >
border: 4px solid #000; -moz-border-radius: 15px; border-radius: 15px;
Put the iframe in a wrapper element and give the wrapping element this CSS property:
transform: translateY(0px);
.corner-wrapper { display: block; overflow: hidden; width: 300px; height: 150px; border-radius: 10px; transform: translateZ(0px); border: 3px solid #eee; }