.video-js .vjs-big-play-button {
    height: 2.5em;
    width: 2.5em;
    line-height: 2.3em;
    border: 0.15em solid #fff;
    -webkit-border-radius: 1.6em;
    -moz-border-radius: 1.6em;
    border-radius: 1.6em;
}

.vjs-big-play-centered .vjs-big-play-button {
    top: 50%;
    left: 50%;
    margin-top: -1.25em;
    margin-left: -1.25em; }