.about-video-sxn {
    background: url(../images/about-video.png);
    /*height: 55%;*/
    width: 82%;
    background-repeat: no-repeat;
    background-size: cover;
    position: absolute;
    top: 75%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin-top: 17rem;
}