.custom-video-wrapper {
  max-width: 1200px;   /* cap width for large screens */
  margin: 0 auto;      /* center it */
}

.custom-video-wrapper video {
  width: 100%;         /* full width of container */
  height: auto;        /* keep proportions */
  max-height: 700px;   /* stops video from being too tall on desktops */
  object-fit: cover;   /* crops nicely on all screens */
  display: block;
}