.header-wrapper .page-video{
    display: flex;
}
.header-wrapper .page-video #videoContainer {
    position: relative;
    width: 720px;
    height: 470px;
    background: #000;}
.header-wrapper .page-video #videoContainer #video{
    width:100%;
    height: 100%;
    position: relative;
    flex:1;
}