.iframe-container{position: relative;width:100%;height:0;padding-bottom: 56.25%;}
.iframe-container iframe{position:absolute;top:0;left: 0;width:100%;height:100%;min-height:inherit;}
.videobox .img-box img{width:100%;display:block;cursor: pointer;}
.videobox .video-icon{position: absolute;top:50%;left:50%;transform: translate(-50%,-50%);overflow:hidden;border-radius: 10px;}