* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial;
    font-size: 17px;
}

#myVideo {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
}

html{
  min-height: 100%;
}

a{
  text-decoration: none;
  font-family: "IM Fell English SC";
  font-size: 25px;
  color: black;

}

li{
  padding: 5px;
  margin-left: 28px;
}

h1{
  font-size: 35px;
  font-family: "IM Fell English SC";
  margin-left: 28px;
}
.content {
    position: fixed;
    left: 0;
    background: rgba(400, 400, 400, 0.5);
    color: #000000;
    width: 25%;
    height: 100%;
    padding-left: 25px;
    padding-top: 80px;
    font-size: 36px;
}

#myBtn {
    width: 200px;
    font-size: 18px;
    padding: 10px;
    border: none;
    background: #000;
    color: #fff;
    cursor: pointer;
}

#myBtn:hover {
    background: #ddd;
    color: black;
}