This video is a few years old (circa COVID pandemic). Now the rapid development of AI has also brought vast improvements in computer generated human voices, so I would like to add that Microsoft Edge pdf reader and browser and Play HT are also excellent sources of high quality simulated voices. Play HT is a web-based service like Open AI's Chat GPT. I prefer to use "Evelyn" at 0.5 speed, although the half speed is often as fast as regular speech. If you don't like the first generation, just regenerate the voice and Evelyn will change her tone, stress, and speed naturally like a real person. Regenerate until you get a take that you like. Microsoft Edge still requires some voice "directing" like adjusting volume at onset and final phonemes like discussed in this video.