Digital AI believed to be used in Netflix UK True Crime Docu movie

I just watched the Netflix True Crime movie: The investigation of Lucy Letby. About a nurse who is believed to have killed babies at the hospital she worked at. Really sad and heavy topic

The reason I brought this to this Reddit is the interviews. Some of them are of real people who want to hide their identities and had their faces covered with I believe with AI.

Watch the docu and what do you think