style.css

:root{
    --primary-color: #212F3D;
}

*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body{
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.5;
    color: #E74C3C;
}

a{
    text-decoration: none;
    color: var(--primary-color);
}

.l-heading{
    font-size: 4rem;
    font-weight: lighter;
}

.lead{
    font-size: 2rem;
    font-weight: lighter;
}

.btn{
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    border-radius: 5px;
    color: #ccc;
    margin: 1rem;
}

.showcase{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    flex-direction: column;
    text-align: center;
}

.video-container{
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    overflow: hidden;
    background: var(--primary-color) url(./image.jpg) center center/cover no-repeat;
}

.video-container:after{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: rgba(0, 0, 0, 0.6);
}

video{
    min-width: 100%;
    min-height: 100%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.video-text{
    z-index: 1;
}