.vjs-annotation {
    position: absolute;
    width: auto;
    padding: 5px;
    color: #FFF;
    font-size: 20px;
    background-color: #F00;
    filter: alpha(opacity=50);
    -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";
    opacity: .5;
}

.vjs-annotation a {
    color: #FFF;
}