Aren't they better off hiring cheap on Fiverr for someone else to do the entire video? The traditional reason against this was that you'd want your narrator to sound like a native speaker. But if AI fixes that, is there any downside to outsourcing video voice-overs to cheap labor countries?
How is that better? The AI should be cheaper and the with less hassle (creating a job, reviewing freelancers, negotiating) with less risk of poor quality/reworks and disputes and yes accent is a big one.
The ideal TTS product for such a person would be something like: sign up and pay > choose voice > paste text > download audio
