video { object-fit: cover; }
.vjs-poster { background-color: transparent; background-size: cover; }
.video-js { width: 100%; }
.video-js .vjs-big-play-button{
    font-size: 3.6em;
    line-height: 2.3em;
    height: 2.5em;
    width: 2.5em;
    -webkit-border-radius: 2.5em;
    -moz-border-radius: 2.5em;
    border-radius: 2.5em;
    background-color: rgba(0,0,0,.4);
    border-width: 0.15em;
    margin-top: -1.25em;
    margin-left: -1.35em;
    border-color: transparent;
}
.video-js:hover .vjs-big-play-button {
    border-color: transparent;
    background-color: rgba(0,0,0,.3);
}
.video-js .vjs-big-play-button .vjs-icon-placeholder:before, .video-js .vjs-play-control .vjs-icon-placeholder:before, .vjs-icon-play:before { color: #fff; }
/* 中间的播放箭头 */
.vjs-big-play-button .vjs-icon-placeholder {
    font-size: 1.33em;
}
/* 加载圆圈 */
.vjs-loading-spinner {
    font-size: 2.5em;
    width: 2em;
    height: 2em;
    border-radius: 1em;
    margin-top: -1em;
    margin-left: -1.5em;
}