.video-wrapper
{ position: relative; padding-bottom: 56.25%; /\* 16:9 aspect ratio\*/
    height: 0;
    overflow:
    hidden;
    border-radius:
    12px; margin-bottom:
    25px;
}

.video-wrapper iframe
{ position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;

}