How to disable YouTube related videos when embedded

By default YouTube videos embedded on other websites will display related (now known as ‘suggested’) videos after your video or playlist has completed.

To disable this you can either add ?rel=0 to the end of the video URL, for example:

<iframe width="420" height="315" src="//" frameborder="0" allowfullscreen></iframe>

or tick the ‘Show suggested videos when the video finishes’ option when creating the embed code.