index.html
<meta name="viewport" content="width=device-width">
<div class="video">
<iframe width="100%" height="315" src="https://www.youtube.com/embed/wcVVXUV0YUY" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</div>
style.css
@media screen and (max-width:480px) {
h1{
text-align: center;
}
nav{
position: static;
}
.caja, .principal, .mapa-contenido, .contenido-diferenciales, .video{
width: auto;
}
.lista-diferenciales, .imagen-diferenciales{
width: 100%;
}
}