/* ****************** Centred videos that squish if viewport is too small ******************** */
video.centredAndSquishy {
    max-width: 100%;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* ****************** Centred YouTube video iframes ******************** */
iframe.centredVid {
    display: table;
    margin-left: auto;
    margin-right: auto; 
}