People asked stuff like this 15years ago (do bunny ears on yourself or pretend to pick your nose). Usually to see if the other person is catfishing with a prerecorded video. It usually happens if the other person types instead of speaks (because it's "late" and people are sleeping)

The only thing interesting about the title is the possibility of real time deepfakes for calls. If it's not realtime then 15years ago called and they want their technique back