VideoAnalysis/static/style.css

#wrapper {
  min-height: 100%;
}

#loaderWrapper {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background-color: #33333333;
  display: flex;
  justify-content: center;
  align-items: center;
}