#wrapper_iframe{
  margin: 0 auto;
  width: 1200px;
}
.block{
  display: inline-block;
  vertical-align: top;
  /*background-color: brown;*/
  width: 560px;
  margin-left: 25px;
  text-align: center;
}
iframe{
  width: 100%;
  height: 315px;
}
.bloc-description{
  padding: 25px;
}
video{
  width: 100%;
}
@media only screen and (max-width:1480px) {
  
  .container{
    width: 1200px;
  }
}
@media only screen and (max-width:1280px) {

  .container{
    width: auto;
  }
  #wrapper_iframe{
    width: 60%;
  }
  .block{
    display: block;
    width: auto;
  }
  iframe{
    margin-left: 0;

  }
}
@media only screen and (max-width:750px){

  #wrapper_iframe{
    width: 80%;
  }
}
@media only screen and (max-width:550px){

  iframe{
    height: 250px;
  }
}
@media only screen and (max-width:550px){
  iframe{
    height: 200px;
  }
}