a.demo-video {
  display: block;
  padding: 1em;
}
.drop:after  {
  font-size: 200%;
}
[for="video-file"] {
  cursor: pointer;
  position: absolute;
  top: 50%;
  left: calc(50% - .25ch);
  font-size: 400%;
}
#video-file {
  width: 0.1px;
  height: 0.1px;
  opacity: 0;
  overflow: hidden;
  position: absolute;
  z-index: -1;
}