title: How to set a video height to be full screen less the size of the header?
body: <p>I have a video placed inside a div, that I want to be at the full size of the screen less the size of the header, which is 50px; So say the user has a screen size of 600 px, I want the video to be 550px. How would I do this?</p>
  
  <p>Thanks
  DcoltGaming</p>