* {
  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%;
}
@media (min-aspect-ratio: 16/9) {
    #myVideo {
        width:100%;
        height: auto;
    }
}
@media (max-aspect-ratio: 16/9) {
    #myVideo { 
        width:auto;
        height: 100%;
    }
}
@media (max-width: 767px) {
    #myVideo {
        display: none;
    }
    body {
        background: url('../resources/static.jpg');
        background-size: cover;
    }
}
.content {
  position: fixed;
  bottom: 50%;
  background: rgba(0, 0, 0, 0.5);
  color: #f1f1f1;
  width: 100%;
  padding: 20px;
}

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

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