.presentation {
  margin-left: 35px;
}

.presentation p {
  margin: 7px 0;
}

.video {
  margin-top: 35px;
  margin-bottom: 35px;
}

@media only screen and (min-width: 1400px) {
  .video {
    margin: 35px 20vw
  }
}

@media only screen and (min-width: 650px) {
  .video {
    margin: 35px 10vw;
  }
}