body {
  padding: 0;
  margin: 0;
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f4f4f4;
  display: grid;
  place-items: center;
  overflow: hidden;
  height: 56.25vw;
}

iframe {
  position: absolute;
  width: 82vw;
  height: 46vw;
  overflow: hidden;
  top: 3.5vw;
  left: 8.5vw;
  outline: black 15px solid;
  border: black 3px solid;
}

.mock-bg {
  width: 100%;
  height: 100%;
  inset: 0;
  object-fit: contain;
}
.host-content-player {
  width: 100%;
}