title: Replacing a video with an image for users with slow connection
body: <p>I have placed an video in my webpage but that video is large in size, so it will load slowly for users with a low connection speed.</p>
  
  <p>I want to be able to detect if the user has a high or low Internet speed; if it's high enough, the video plays, and if not, the video is replaced with an image.</p>
  
  <p>Is this possible to do?</p>