Even with a perfectly convincing TTS voice it's still given away by the fact that they don't show themselves on video interacting with the product, they usually

Even with a perfectly convincing TTS voice it's still given away by the fact that they don't show themselves on video interacting with the product, they usually just show a slideshow of official product images. At least some people must already be falling for this crudely generated content for it to be worth their while to produce it though.