As I got home, I decided to look through some youtube videos, if it would reveal this secret. And it did, quite soon even. And I realized we started to work on it already last week, the diagonal part (in 5.22) with arabesques and pirouettes en dehors.
Here it is -> starts at 4.54, danced by Gillian Murphy herself. Not bad, I think... ;)
p.s. We won't be doing it en pointe, but I don't mind - wouldn't be possible for me at least :)