.shuffleEmbed {
   width: 560px; /* you have to have a size or this method doesn't work */
   height: 315px; /* think about making these max-width instead - might give you some more responsiveness */

   position: absolute; /* positions out of the flow, but according to the nearest parent */
   top: 0; right: 0; /* confuse it i guess */
   bottom: 0; left: 0;
   margin: auto; /* make em equal */
   margin-top: 24em;

 }

  .centerEmbed {
     text-align: center;
     margin-top: 18.5em;
     color: #e2e2e2;
     font-weight: bold;
 }