.ucVideoStream_player {
    display: flex;
    justify-content: center;
}
        .ucVideoStream_player iframe {
            width: 560px;
            height: 315px;
        }



@media screen and (max-width:1120px) {
    .ucVideoStream_player {
        position: relative;
        padding-bottom: 56.25%;
        padding-top: 30px;
        height: 0;
        overflow: hidden;
    }

        .ucVideoStream_player iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }
}