.video-box {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .5);
    z-index: 9999;
}

.video-box .box {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50%;
}

.video-box .box video {
    object-fit: fill;
    width: 100%;
}

.video-box .box img {
    position: absolute;
    top: 5%;
    right: 5%;
    width: 3%;
    cursor: pointer;
}

@media screen and (max-width:768px) {
    .video-box .box {
        width: 92%;
    }
}