.videobox{width: 100%; height: 100vh;   display: block;  background: #333;  overflow: hidden;  position: fixed;  top: 0;left: 0; z-index: 999999; display:none;}
.videoClose{    width: 40px; height: 40px; display: block;  position: absolute;  top: 20px;   right: 20px; z-index: 9999; cursor: pointer;}
#myVideo{    width: 100%;  height: 100%;}