I imagine the most above-board use for something like this would be in scripted tv and movies. Basically an enhanced form of ADR (https://en.wikipedia.org/wiki/

I imagine the most above-board use for something like this would be in scripted tv and movies. Basically an enhanced form of ADR (https://en.wikipedia.org/wiki/Dubbing_(filmmaking)#ADR/post-sync https://en.wikipedia.org/wiki/Dubbing_(filmmaking)#ADR/post-...). Of course, I anticipate plenty of nefarious uses. A place where I don't think it will be used much is actual facing-the-camera-talking-head content. Something we have learned from YouTubers is that audiences don't care if there are discontinuous cuts during a monologue. YouTubers don't try to pretend they did it all in one take, and will happily edit their video as if editing text. The cuts are obvious in both the audio and video. And still it works.