* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial;
    font-size: 17px;    
}

#myVideo {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
}

.content {
    position: fixed;
    left: 0;
    right: 0;
    margin: 5% auto;
    background: rgba(0, 0, 0, 0.3);
    color: #f1f1f1;
    width: 100%;
    padding: 20px;
    
}

.fixed-content {
    top: 0;
    bottom: 0;
    position: fixed;
    overflow-y: hidden;
    overflow-x: hidden;
}

@media only screen and (max-height: 820px) {
    .fixed-content {
        overflow-y: scroll;
       
    }
}