I don't get this. If she were already really fat I could see her making this video, and defining her sexuality by her fatness. But if this video is after she has put on weight that means she must have started off at a fairly normal weight.. I, I just don't know.
She has made a series of decisions in her life that have led to the creation of this video. What those decisions were or how they brought her to this point--these are thoughts decent people need to concern themselves with.