.video-img-wrap {
    position: relative;
}

.play-video-btn-wrap .play-video-btn {
    background-image: url("/wp-content/uploads/2014/09/video-play-btn.png");
    background-position: 0 0;
    background-repeat: no-repeat;
    background-size: 80px auto;
    position: absolute;
    width: 80px;
    height: 80px;
    overflow: hidden;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
    border: none;
}