.video-js .vjs-big-play-button {
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
  background-color: rgba(115, 133, 159, 0.5);
  width: 56px;
  height: 56px;
  border-radius: 56px;
}
.video-js .vjs-big-play-button .vjs-icon-placeholder:before {
  line-height: 1.7 !important;
}