.box-video {
    position: relative;
    max-width: 1280px;
    margin: 0 auto 20px auto;
    cursor: pointer;
    overflow: hidden;
}

.box-video .bg-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    z-index: 2;
}

.box-video .video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
}

.box-video .video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.box-video .bt-play {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -30px 0 0 -30px;
    display: inline-block;
    width: 60px;
    height: 60px;
    background: #fff;
    border-radius: 50%;
    text-indent: -999em;
    cursor: pointer;
    z-index: 2;
    -webkit-transition: all .3s ease-out;
    transition: all .3s ease-out;
}

.box-video .bt-play:after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    height: 0;
    width: 0;
    margin: -12px 0 0 -6px;
    border: solid transparent;
    border-left-color: #000;
    border-width: 12px 20px;
    -webkit-transition: all .3s ease-out;
    transition: all .3s ease-out;
}

.box-video:hover .bt-play {
    transform: scale(1.1);
}

.box-video.open .bg-video {
    visibility: hidden;
    opacity: 0;

    -webkit-transition: all .6s .8s;
    transition: all .6s .8s;
}

.box-video.open .video-container {
    opacity: 1;
    -webkit-transition: all .6s .8s;
    transition: all .6s .8s;
}