.row-flex {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    flex-wrap: wrap;
}

.row-flex > [class*='col-'] {
    display: flex;
    flex-direction: column;
}

img {
    display: inline-block;
    max-width: 100%;
    height: auto;
}

.vid169 {
    position: relative;
    padding-top: 56.25%;
}

.vid169 iframe {
    position: absolute;
    left: 0;
    top: 0;
    width: 100% !important;
    height: 100% !important;
}