.b7-signage-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
}

.b7-signage-container video, 
.b7-signage-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}