Guessing 22's. When the one she keeps going with locks-back it has that goofy middle-of-the-slide action on it that some folks use on their semi 22 pistols.
So...I mean, I suppose if anyone wanted to be real pedantic and no-fun they could clutch pearls and say she shouldn't have dropped the one and dual-pistoling is a no-no that nobody should ever do even with small rounds because your off hand has less positive control and blah blah blah...But, like, anybody who has ever seen a movie ever who's not mega-fudd levels of buzzkiller is gonna wanna try the gat-in-each-hand alternating shots thing. She does it safely, and never seems out of control.
Honestly, most eyebrow-raising thing in the video is the camera-person's initial positioning that's kind've in front of the shooter.
But that could be a selfie-stick or something as easily as anything else and is pretty nitpicky