AI-generated talking-head video

 This is a typical video which is AI-generated from a script that you input. To be honest, the effect is not bad. The facial expression is quite natural. The intonation is not artificial (unlike the early days of text-to-speech functionality). Even the lip movements seem to correlate with the pronunciations. 

https://email.d-id.com/share/hubspotvideo/78600586230?utm_campaign=Sep%20Blitz%20Campaign&utm_medium=email&_hsmi=76207517&_hsenc=p2ANqtz-8VpweN_MXWbDnXGB-PNCXHVXgch12bUjT6jAW8g3tb4K2mgfxElkdShEsAOZ9qB3qP-zOEkGl79wKQhKyvfBnxHaQF_Q&utm_content=76207517&utm_source=hs_email

But the problem is: Why would I need this technology in teaching? Such videos have to be short; otherwise students will lose attention. Then, if I have the script already, why don't I just video-record my presentation myself?