#changeVideoSize {
    position: absolute;
    top: 0;
    right: 40px;
    width: 120px;
    height: 44px;
    border: none;
    outline: none;
    background: none;
 }
 .layer-alert-video{
     overflow: hidden;
 }
 .media-body {
    position: relative;
    max-width:calc(100% - 70px);
 }