.column-background-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.column-background-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.wp-block-column {
    position: relative;
    overflow: hidden;
}

.wp-block-column > * {
    position: relative;
    z-index: 1;
}