body {
    text-align: center;
    margin: 0;
    padding: 20px;
    background-color: #a9a9a9;
}
.contenedor {
    margin: 0 auto;
    background: #a9a9a9;
    padding: 20px;
    border-radius: 10px;
}
h1 {
    color: #000;
}
h3 {
    color: #000;
}
video {
    width: 400px;
    height: 380px;
    border-radius: 10px;
}
.texto {
    margin-top: 15px;
    color: #000000;
    line-height: 1.5;
}