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

.container {
    max-width: 1200px; 
    width: 90%; 
    margin: 0 auto; /* Center it */
    margin-top:1em;
}

@media (max-width: 768px) { 
    .container {
      width: 95%; 
      margin-top:0.5em;
    }
}