We love innovative ideas, and we are just impressed with this innovative fold-up balcony invented by some Danes.
You have to see the video for it to make sense - here's a link to it on youtube.
We haven't seen one of these in person to vouch for it, but looks like you could learn more here if you have a steep enough roof:
https://www.veluxusa.com/products/roof-windows/cabrio-balcony