* {
  margin: 0;
  padding: 0;
  border: 0;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  vertical-align: baseline;
}

video {
  width: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -o-object-fit: cover;
  object-fit: cover;
  -o-object-position: center center;
  object-position: center center;
}

audio {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}

@-webkit-keyframes aparecer {
  0% {
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  75% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

@keyframes aparecer {
  0% {
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  75% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

body {
  min-height: 5000vh;
}

video {
  position: fixed;
  top: 0;
  right: 0;
}