.section-banner video {
    display: block;
    width: 100%;
    height: 320px;
    object-fit: cover;
}

.section-banner img {
    display: block;
    width: 100%;
    height: 320px;
    object-fit: cover;
}

@media screen and (max-width:500px) {
    .section-banner img {
        height: 160px;
    }

    .section-banner video {
        height: 160px;
    }
}