Okay, stepping into the surreal Amberverse here, the weight loss she's claiming represents about 8% of her also claimed starting weight. It doesn't matter how she lost it, (I agree with everyone here saying it was due to Becky being out of it & all the antibiotics), I'd be happy & excited about that. I don't see anything remotely like happiness or enthusiasm in that short video.
It's as if she's trying to convince herself she has lost that, (who the hell knows at this point?), & that it's a GOOD thing.
If she's serious about putting in the work needed to lose the amount she needs to lose to live a decently healthy life from here on in, she should be looking at what she's eaten, (1 resolution was food journaling), compare that to weight lost over varying time periods, (something else she was going to journal), compare again to days where she got more steps in & find out what seemed to result in the fastest weight loss.
Instead, I get the feeling she's still on a bound to be fruitless search for something "fun", cute & quirky that still lets her esat what & when she wants.
Major lifestyle changes are a bitch. Initially, they're inconvenient, there's a lot of time spent learning what you need to learn to succeed & the doing... which is not fun at first. Even when you're seeing positive results, it can take a long time to mentally & emotionally embrace what you're doing & start feeling good about it.
And that's where she falls down. The minute her initial planning high fades, she gets discouraged, probably gets depressed & quits. "Fuck it, not worth feeling like this!" Therapy would help her learn to change that thinking, abit at a time, over time.
She spends more time worrying about "depriving" herself of food then she does worrying about depriving herself of health & a meaningful life. She's always, scared, worried, anxious & every other negative word you can use to speak about emotions.
Therapy would give her tricks to use to stop the negative vocabulary & replace it with positive ways to speak of, then think about what she's doing.
But that whole control thing & hating being told what to do gets in her way every time. Ironically, the more she worries about keeping control, the less she has. The more defiant about being told what to she is, the more her increasing limitations tell her what she will or will not be able to do.
Okay, time to get off & bust up the soap box.