style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Verdana, Geneva, Tahoma, sans-serif;

}

html,
body {
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.container {
    width: 100%;
    height: 100vh;
}

video {
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    position: fixed;
    top: 0;
    left: 0;
    z-index: -2;
}

.copy {
    position: absolute;
    top: 50%;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: space-around;
    color: white;
    font-size: 14px;
    text-transform: uppercase;

}

.blocks {
    width: 100%;
    height: 100vh;
}

.block {
    position: fixed;
    width: 50%;
    height: 100vh;
    z-index: 0;
    background: white;
}

.block-left {
    left: 0;
}

.block-right {
    right: 0;
}

.letter {
    position: absolute;
    z-index: 10000;
    padding: 0 0.2em;
    font-size: 8em;
    color: rgb(255, 255, 255);
    mix-blend-mode: difference;
}

.row {
    width: 100%;
    height: 50vh;
}

.top-left, .top-right, .bottom-right {
    position: absolute;
    z-index: 10000;
}

.top-left {
    top: 32%;
    left: 42%;
}

.top-right {
    top: 32%;
    right: 42%;
}

.bottom-right {
    bottom: 32%;
    right: 42%;
}

@media(max-width: 900px) {
    .letter {
        font-size: 12em;
    }
}