.demo-section {
    padding: 60px;
    padding-top: 100px;
    background: radial-gradient(circle at center, rgb(1 2 2 / 77%) 0%, /* center */ rgb(0 0 0 / 92%) 100% /* edges */), url(tile.jpg);
}

.video-grid {
    display: grid;
    gap: 20px;
    justify-items: center;
  }

  /* Default: mobile = 1 column */
  .video-grid {
    grid-template-columns: 1fr;
  }

  /* Tablet = 2 columns */
  @media (min-width: 768px) {
    .video-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  /* Laptop / Desktop = 3 columns */
  @media (min-width: 1024px) {
    .video-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }

  .video-container {
    width: 100%;
    max-width: 800px; /* you can tweak this */
    aspect-ratio: 16 / 9;
    position: relative;
  }

  video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
  }