Ethical worries: dignity, privacy, and consent

There's an emerging industry that uses artificial intelligence to create simulations of people who've died. These post mortem avatars are also called griefbots.

Some critics, including Tomasz Hollanek, a researcher at the University of Cambridge, say this practice raises a number of ethical issues. He walks us through the mechanics of how this technology works, and how it may or may not be used responsibly.