The AI "voice-over clone" was more like default TTS David_British_1, the emotional video montage and text was what worked on people.
Ironically, the daughter's vlog [2] protesting the first fake "I'm dying" confession [1] helped the story gain traction, there was a second fake video of a random female voice claiming to be her [3] verifying the original story [1] which is probably what you saw.
The point is endless random autoplay is dupe central.