Disable related videos at the end of Youtube video

Hi there,

First off, WELL DONE on the new design!! Looks AWESOME!

I need to disable the related videos at the end of the Youtube videos please.
Normally if you embed the video you add '?rel=0' at the end of the URL
Where in the code can I add this?

I know that I'll have to edit this file again every time I update :slight_smile:

Thank you