::selection { background: #6d8891; color: #ffffff;} 
.video-mask-wrapper {
  position: relative;

  mask-image: 
    linear-gradient(to top, rgba(0,0,0,0.5) 0%, black 3.75%, black 100%),
    linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, black 90%, black 100%),
    linear-gradient(to left, rgba(0,0,0,0.5) 0%, black 60%, black 40%, rgba(0,0,0,0.5) 100%),
    linear-gradient(to right, rgba(0,0,0,0.5) 0%, black 60%, black 40%, rgba(0,0,0,0.5) 100%);

  mask-composite: intersect;
  -webkit-mask-image: 
    linear-gradient(to top, rgba(0,0,0,0.5) 0%, black 3.75%, black 100%),
    linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, black 90%, black 100%),
    linear-gradient(to left, rgba(0,0,0,0.5) 0%, black 60%, black 40%, rgba(0,0,0,0.5) 100%),
    linear-gradient(to right, rgba(0,0,0,0.5) 0%, black 60%, black 40%, rgba(0,0,0,0.5) 100%);

  -webkit-mask-composite: destination-in;

  mask-repeat: no-repeat;
  -webkit-mask-repeat: no-repeat;
  mask-size: 100% 100%;
  -webkit-mask-size: 100% 100%;
}