Youtube video inside a lightbox. How to hide the Youtube recommendations?

Hello everyone, I have a Youtube video inside a lightbox. I want prevent Youtube from showing related videos when pausing or at the end of the video. I found out about the $rel=0 parameter, but this doesn’t seem to work (it seems to be deprecated)

On the other hand, the Youtube widget has the option to hide the related videos, and it works.

The problem is, there’s no way to add a Youtube widget or a html embed inside a lightbox.

Do you have any suggestions? Should I create a custom lightbox from scratch?

Thank you!

View only link of a test page: https://preview.webflow.com/preview/vdx-staging?utm_medium=preview_link&utm_source=designer&utm_content=vdx-staging&preview=650c06b184c9567d8e2fe7587a96fb5c&pageId=62a9ecd4f70033f9f38e26cd&workflow=preview


Here is my site Read-Only: LINK
(how to share your site Read-Only link)