Autoplay embedded videos in lightbox

Hello,

I’m trying to build a video gallery, and I would like the embedded videos (youtube) to autoplay when the lightbox opens.
I didn’t find an option like that in the settings, and also adding autoplay=1 in the video URL doesn’t help.
could you please advice on a solution?
clicking on the PLAY button twice doesn’t make a good user experience.
Sasha

The page I need help with: [log in to see the link]