lite-youtube {
  background-color: #000;
  position: relative;
  display: block;
  contain: content;
  background-position: center center;
  background-size: cover;
  cursor: pointer;
}
lite-youtube::before {
  content: "";
  display: block;
  padding-bottom: calc(100% / (16 / 9));
}
lite-youtube > iframe {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}
.lty-playbtn {
  width: 70px;
  height: 46px;
  background-color: #212121;
  z-index: 1;
  opacity: 0.8;
  border-radius: 14%;
  transition: background-color 0.3s;
  border: none;
  outline: none;
  cursor: pointer;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.lty-playbtn:before {
  content: '';
  border-style: solid;
  border-width: 11px 0 11px 19px;
  border-color: transparent transparent transparent #fff;
  position: absolute;
  left: 26px;
  top: 12px;
}