Hey Andrea,
I am using videopro and I’m using the video lightbox settings, but I’m not sure if it has to do with the self hosted player that I have, but this is the error I’m getting:
Failed to execute ‘postMessage’ on ‘DOMWindow’: The target origin provided (‘https://www.youtube.com’) does not match the recipient window’s origin (‘http://tdd2w.wpengine.com’).