The tourist told Pell his mother wanted to know if he was innocent
“Tell her that I am,” Pell said.
Channel 9 published the video on its Facebook page late on Saturday and said it had been taken earlier in the day.
Pell is on leave of absence to defend himself and the video marks the first time he has been seen in public outside Rome since police charged him.
He is due to appear in a Melbourne court on July 26.
Pell`s Australian lawyer could not be reached by telephone and did not immediately respond to an emailed request for comment.