.wrapper {
    width: 80%;
    margin: auto;
}

video {
    width: 100%
}
.manual img {
    max-width: 100%;
}
.manual {
    display: grid;
    grid-template-columns: 1fr;
    grid-gap: 40px;
}

@media (orientation: portrait) {
    .wrapper {
        width: 100%;
    }
    .manual {
        grid-template-columns: 1fr;
    }
}