.videoContainer {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
   
  }
  
  iframe {
    /* optional */
    width: 100%;
    height: 100%; 
  }