I think this is a violation of some FAA rule.

A few years ago, back in the tape days, I was on an A319 which played the A320 video. I pointed it out to the purser (I was in row 1). He first did not believe me. Once he confirmed it, he stopped the tape right away and did it manually. He said that that would be a huge FAA violation and taped a huge piece of paper on the equipment door with the warning for the next crew. He was very appreciative.

3 weeks ago, I was on a 739 that had 2 video screens inop that I could see (I was in row 11 or 15 I think and saw 2 screens did not play). I told the FA after takeoff and she seemed somewhat took mental notes (i.e. instead of just ignoring it).

I am sure someone here can cite the FAR on this subject