Edit in JSFiddle

<div class="vid">
  <iframe title="YouTube video player" width="500" height="311" src="http://www.youtube.com/embed/7g0We1DY7WI" frameborder="0" allowfullscreen></iframe>
</div>

.vid {
  -webkit-transform: translate(20px, 50px);
     -moz-transform: translate(20px, 50px);
      -ms-transform: translate(20px, 50px);
       -o-transform: translate(20px, 50px);
          transform: translate(20px, 50px);
}