Wow, I just did that one two days ago on the floor. It was challenging-a-plenty for me...
I think it would take a few tries to decide on a seamless series of mods for the ball. There are a few "one-leg" sections which I am unsure of how the ball would affect- maybe lots of rolling around and rewinding?
But there are lots of basic crunches and that rope thing--Mama mia! Those would be fun to try on the ball on your own, with some good consistent BPM music on...
My answer is influenced by the fact that I work out at 5 a.m. and have limited time, so I have learned to stick with "quick-an-dirty" options, mainly, as closely similar to as-filmed as possible, no guilt for skipping any sections, and documenting what body parts I have or have not worked that week.
That's probably a longer answer than you had in mind! Teehee