.vimeo-wrapper {
   position: fixed;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   z-index: -1;
   pointer-events: none;
   overflow: hidden;
}
.vimeo-wrapper iframe {
   width: 100vw;
   height: 56.25vw; /* Given a 16:9 aspect ratio, 9/16*100 = 56.25 */
   min-height: 100vh;
   min-width: 177.77vh; /* Given a 16:9 aspect ratio, 16/9*100 = 177.77 */
   position: absolute;
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
}