#bgVideo {
  width: 100vw;
  height:100vh;
  background: #000;
  position:absolute;
  object-fit: cover;
}

#MuteButton::before {
    content:  '🔈';
}

#MuteButton.muted::before {
    content:  '🔇';
}

#MuteButton {
  position:absolute;
  bottom:-5rem;
  right:1rem;
  background: rgba(0,0,0,.5);
  border: none;
  color: #fff;
  z-index: 5;
  font-size: 1.8rem;
  border-radius: 2rem;
  width:3rem;
  height:3rem;
  line-height:3rem;
  text-align: center;
}

@media screen and (max-width:880px) {
#bgVideo{width: 100%;
height:320px;}#MuteButton { bottom:-5rem;}
}