html,
body {
  padding: 0;
  margin: 0;
  background-color: #51e56d;
  color: white;
}

.font-sans {
  font-family: sans-serif;
}

.content {
  text-align: center;
  margin: 0 auto;
  padding-left: 40px;
  padding-right: 40px;
}

.content-desc {
  text-align: center;
  margin: 0 auto;
  padding: 50px;
  max-width: 650px;
  font-size: 23px;
}

.video {
  display: inline-block;
}

.video iframe {
  width: 720px;
  height: 420px;
}

@media screen and (max-width: 780px) {
  .video {
    display: block;
  }
  .video iframe {
    width: 560px;
    height: 315px;
  }
  .content-desc {
    padding: 30px;
    font-size: 15px;
  }
}

@media screen and (max-width: 640px) {
  .video iframe {
    width: 320px;
    height: 200px;
  }
}

@media screen and (max-width: 375px) {
    .video iframe {
      width: 320px;
      height: 200px;
    }
    .content {
        padding-left: 20px;
        padding-right: 20px;
      }
      
      .content-desc {
        padding: 30px;
      }
  }