title: In videojs, how to unbind keyboard shortcuts set by videojs?
body: <p>I am building my own media player based on videojs by modifying the source code. What I am trying to do now is to bind my own keyboard shortcuts, but apparently videojs has set some shortcuts in advance. In order to bind my own keyboard shortcuts, I need to remove the default shortcuts set in videojs.</p>
  
  <p>How to unbind/remove keyboard shortcuts set by videojs?</p>