Watched the vid a couple of times. What struck me was the rigidity and straightness of her legs. Cats don't have straight legs, especially the back ones, they sort of fold in three places. To me, as a total amateur, this suggests that her joints have become dislocated. The only other time I've seen such straight back legs was in Grissel, a cat given to me by a vet boyfriend. She had broken her leg and had a steel pin through the joints to hold her leg still; this prevented her from bending it.
It doesn't look as though this is nerve damage (at least not on its own), as the joints would still naturally bend.
If you touch her legs, or rub them, does she show signs of feeling your touch. (Tickle her back paws, cats are usually ticklish there.)
It would be great if you could get her examined by a specialist vet.
Maybe one of the VN's could comment on what I've said - even if they think I'm talking total rubbish.
All the best to you, Jasmine and her kittens.
Also, she moves her right leg. She straightens it out a little at one point, which indicates that leg may recover.
My best guess is that she's damaged her pelvis. An x-ray really is called for.
