body {
  background-image: url('');
  background-attachment: fixed;
  background-repeat: repeat;
  
  text-align: center;
  color: yellow;
}
.container {
  background-color: blue;
  display: flex;
  padding: 5px;
  overflow: hidden;
  justify-content: center;
  grid-gap: 10px;
 
}
.container div {
  text-align: center;
}
.chooser {
  background-color: red;
  width: 35%;
}

iframe {
  width: 65%;
}