.kche-t43.videobox .kche-flex-item .iframe-container{position: relative;width:100%;height:0;padding-bottom: 56.25%;}
.kche-t43.videobox .kche-flex-item .iframe-container iframe{position:absolute;top:0;left: 0;width:100%;height:100%;min-height:inherit;}
@media (max-width:550px){.kche-t43.videobox .kche-flex-item{width:100%;}}