MediaWiki:Common.css

#bg-video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    object-fit: cover;
    object-position: center 70%;  /* shifts the video down */
    pointer-events: none;
    opacity: 0.3;
}

#content, .mw-body, .mw-body-content {
    background-color: #ffffff; /* or dark like #1a1a1a for dark mode */
    color: #000; /* adjust if you're in dark mode */
    padding: 1em;
    border-radius: 8px;
}