All my YouTube clips are minimized (update 2 oct 2013)

Hello Responsive Masters!

– Since the update today all the embedded YouTube clips with my animated stories (AND Vimeo clips) are minimized and not centered anymore.
– When I maximize them, they are NOT responsive anymore. How is that possible?
– Can I restore it to the old situation? It is quite a job to center all the little movies, and it certainly doesn’t look professional anymore…