.youtube:hover{
  cursor: pointer
}
.youtube:hover .play{
      background: red;
     opacity: 0.9
}

.play {
  font-size: 1.1em; /* change this to change size */
  transform: translateY(150px);
  /*position: absolute;*/
  left:0;
  right:0;
  margin:auto;
  background: #3b3636;
  opacity: 0.75;
  border-radius: 50% / 10%;
  color: #FFFFFF;
  height: 3em;
  padding: 0;
  text-align: center;
  text-indent: 0.1em;
  transition: all 150ms ease-out;
  width: 4em;
  margin-top:-50px
}

.play::before {
  background: inherit;
  border-radius: 5% / 50%;
  bottom: 9%;
  content: "";
  left: -5%;
  position: absolute;
  right: -5%;
  top: 9%;
}

.play::after {
  border-style: solid;
  border-width: 1em 0 1em 1.732em;
  border-color: transparent transparent transparent rgba(255, 255, 255, 0.75);
  content: ' ';
  font-size: 0.75em;
  height: 0;
  margin: -1em 0 0 -0.75em;
  top: 50%;
  position: absolute;
  width: 0;
}

div.youtube{
  max-width: 560px; 
}

div.youtube img{
  width:100%;
}

div.youtube iframe{
   width:560px;
   height:315px;
}