.youtube-video-item a { margin-bottom: 8px; height: 186px; background-position: center center; background-repeat: no-repeat; display: block; }
.youtube-video-item a span { display: none; }
.youtube-video-item a:hover span { height: 186px; background: url('../Content/Images/video-play-button.png') no-repeat center center; text-indent: -9999px;  display: block; }