div.vid {
position: relative;
/* Youtube is 16:9 aspect ratio */
padding-bottom: 56.25%;
height: 0;
}
div.vid iframe {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
div.screens {
width: 100%;
display: flex;
justify-content: center;
flex-wrap: wrap;
margin: 1em 0;
}
div.screens img {
max-width: 100%;
height: auto;
}