.video-js .vjs-big-play-button {
    width: 50px;
    height: 50px;
    left: 50%;
    top: 50%;
    margin-left: -25px;
    margin-top: -25px;
    -webkit-border-radius:25px;
    -moz-border-radius:25px;
    border-radius:25px!important;
}
.vjs-loading-spinner {
    -webkit-border-radius:25px;
    -moz-border-radius:25px;
    border-radius:25px!important;
}