in tai chi we have a move that leaves the leg out like that. what we do is wait until somebody takes advantage of it then step up and fall into a low strike and stamp on the others foot at the same time to anchor them to us and keep them from retreating.
I have no idea if that's what she's doing here but it might be.
Though another defense besides sprawling and if you don't mind being in your back, is to do a guillotine choke/neck crank if the takedown is done sloppily.
Well basically the grappler shoots for the legs and drives said opponents legs up into a slam, worse come to worse if you can't get both feets, a single leg would suffice and then go for a trip. Though if she were to defend the takedown, she should sprawl which is basically going down on the grappler who's doing the takedown into a burpee drop.
in tai chi we have a move that leaves the leg out like that. what we do is wait until somebody takes advantage of it then step up and fall into a low strike and stamp on the others foot at the same time to anchor them to us and keep them from retreating.
I have no idea if that's what she's doing here but it might be.