title: How to make the path a variable in react-router?
body: <p>Like I have   <code>/a/Star/video</code></p>
  
  <p>I want to make the <code>video</code> a variable, <code>star</code> is already a param. How to do it? I need to know is, When video is provided, I need to render one component and when it is not provided, I want to render another component?</p>