That analogy with the mystery TV is actually a really good way to frame it. I've had some luck explaining it as the difference between a meal and a bag of candy. A full episode of something has a beginning, middle, end, it's a complete thought. Those rapid-fire AI videos are just empty sugar that leaves them crashing hard afterwards. It's tough because the grandparents just see a quiet, occupied kid and think they've found a magic trick. They don't witness the meltdown twenty minutes later when the screen is off and everything else in the real world moves too slow for their fried little brain. I had to start sending my mother in law specific links to playlists I'd pre-approved instead of giving general guidelines, because her idea of a "cute animal video" was some nightmarish, uncanny valley thing with bizarre sound effects. Sticking to the "would you have let me watch this if it were a physical VHS tape from a stranger" logic seems to click for the older generation. It puts it in terms of trust and source, which they get, instead of trying to explain the dopamine mechanics of modern editing.