What's worse is that he is going to be 100% aware of Barb's problems at that point and he will absolutely not show her on camera anymore so people don't see what he's doing or so people can do something about it, call services, etc. But I can see him showing her in a way that doesn't make the neglect too obvious (like tell her to shut up before recording, put the pile of diapers aside, etc. - the woman is going to be so weakened that she simply won't oppose him) if that means more money begging videos and make people feel pity for them. After the video, he'll just leave her again and go back to his bubble.
Barb has always been a horrible neglectful person and, at least to me, it still feels bad to see what's gonna happen to her.