How to exclude relevant videos from being displayed at the end of the YouTube video

When adding a video via the normal YouTube video, the relevant YouTube videos may display at the end of the video (when the video is done playing).

If you want to avoid this, here is what you need to do:

1. Instead of the YouTube video widget, use the Custom HTML widget
2. In the Custom HTML widget, add the following code:
   <iframe width="560" height="315" src="http://www.youtube.com/embed/VIDEO_ID?rel=0" frameborder="0" allowfullscreen></iframe>
3. Replace the VIDEO_ID with the ID of your video (look it up in your YouTube video URL). Note: "rel=0" in the video src is what hides the relevant videos.