iframe, object, embed 
{
	width:640px;
	height:360px;
    background-color:#fff;
}

@media(max-width:767px){
   iframe, object, embed {
        width:100%;
	    max-width:640px;
	    height:380px;
  
    }
}

@media(max-width:480px){
   iframe, object, embed {
	    height:250px;
    }
}