I think this stream gave us a real inside look at Amber's perception and thought processes when it comes to food.
At the beginning of the stream, she states that she will not be eating on stream because she made sure to eat beforehand. About an hour later, she produces a large salad that she eats slightly off camera. Right after, we see her begin to eat a KitKat bar.
Not long after, she talks about wanting to cook a homemade meal in her kitchen, and then she and Becky have the idea that they should make tacos but that they currently lack the ingredients. Amber claims she is "starving". Keep in mind she just had a takeout salad - meaning it was likely a large entree-sized salad from a restaurant that packs a big calorie punch - and had already told her audience that she also made sure to eat right before the stream so she wouldn't have to eat during.
At the end of the stream when signing off she states again that she's hungry and that they're going to go eat. Amber is not present when it comes to her thought processes regarding food and how much she has eaten already.
I don't hate her for being fat and I don't hate anyone for being fat. What makes me seethe is when people who struggle with obesity claim that they eat like birds and just can't understand why they won't drop the weight.