.uc-video {
    width: 50%;
    margin-left: auto;
    margin-right: auto;
}

.uc-video video {
    height: 400px;
}

@media screen and (min-width: 768px) {
    .uc-video {
        width: 60vw;
        margin-left: auto;
        margin-right: auto;
    }

}