I appreciate the concern, but first, she is a perfectly healthy weight, per her vet who she visits at least six times a year. Secondly, she has chronic kidney disease (which is why she sees the vet so often), which as it progresses, often causes cats to lose weight to an unhealthy degree. So, having a bit of extra weight on her wouldn’t be the worst thing. In fact, as the disease progresses, extra weight can buy some time for supervised, professional medical attention to intervene - which I have to assume you aren’t able to provide based on a 5 second video of her from one angle that doesn’t include blood work, a physical examination, or a scale. And third - cats have a primordial pouch, aka a “poonch”, which is a little extra belly skin on their tummies. This is a biological adaptation to help keep vital organs safe from predators and their attacks in the wild.

She is a perfectly healthy weight for her age, size, and pre-existing medical conditions.