The crux of this video is that the creator of it didn’t have a firm stance on either side of that argument until, during one bout of generations, Bing produced an almost exact replica of the "Is this _____?"meme. It crossed the threshold of ‘inspiration’ into out-and-out copying, and he provides a theory as to how that happened.
Ultimately, he now feels uncomfortable using AI generations in any sort of commercial endeavor due to that risk of plagiarism, and the ethical concerns that raises.