?autoplay=1 does not seem to work
when you add "imagebox" there is a trigger in the menu thats called 'autoplay'.
For now the parameters of Youtube URL is not working in our theme. But we will consider to support that soon.
have you considered supporting this yet? it's been a year. being able to add parameters to the YouTube URL (autoplay and rel=0) would be extremely valuable.
I would like to see this supported too!