iframe - How do I hide related videos at the end of a YouTube playlist embed code?

Question

I am using this code to embed a playlist:

<iframe width="816" height="459"     
  src="https://www.youtube.com/embed/videoseries?list=xxx" 
  frameborder="0" allowfullscreen="">

To hide the related videos, normally I add ?rel=0 (that's in the case of a single video embed), but if I try it here:

<iframe width="816" height="459" src="https://www.youtube.com/embed/videoseries?list=PL4Zkb_7gMrOzZlVy7jIeCjwScavYp6ssm?rel=0" 
 frameborder="0" allowfullscreen="">
 </iframe>

I get the "bad video" fuzzy YouTube screen (sorry, I don't know the technical term for this)!

There is no "hide related" option in the YouTube "SHOW MORE" settings for the playlist.

Answer 1

You have to use the '&' when adding more parameters to the url. Update the src field with following.

"https://www.youtube.com/embed/videoseries?list=PL4Zkb_7gMrOzZlVy7jIeCjwScavYp6ssm&rel=0"