.video-hw-back {
    width: 720px;
    height: 405px;
    background: #000;
}

video {
    display: flex;
    align-items: center;
    justify-content: center;
    object-fit: contain;
}<!--ecms sync check [sync_thread_id="a68f6e271be0d23e820cf6e61402aa0b" sync_date="2023-08-31 17:41:22" check_sum="a68f6e271be0d23e820cf6e61402aa0b  signature="#$enorth_signature_value$#"]-->