video {
  width: 100%;
  height: auto;
}

@media screen and (min-width: 601px) {
  .telefonoText {
    font-size: 80px;
  }
}

/* If the screen size is 600px wide or less, set the font-size of <div> to 30px */
@media screen and (max-width: 600px) {
   .telefonoText {
    font-size: 30px;
  }
}