Automatically insert autoplay into CMS YouTube lightbox?

Hi, is there a way to insert automatically the autoplay attribute to every Youtube link added by the client via CMS collection (just in the Video field, not for links in rich text)? To be more precise the video is playing in a lightbox.

I guess it should be possible to fetch the URL of the video by a custom code and manipulate it (add the attribute) before the lightbox reads it. But unfortunately I’m not able to do it myself.

Anyone can help with this? Thanks!

Here is my site Read-Only: Webflow - Hanousek a partneři