My Grandad lives alone and has in the past 12 months really gotten into YouTube. He's long used it to learn the latest practices in plumbing, electrics, gardening and woodwork (he's a seriously capable 86yo, always has been) and honestly our subscriptions are very similar...

But he's addicted to shorts. Doomscrolls endlessly in his downtime. Doesn't question whether obvious GenAI is real or not, and having looked over his shoulder a few times, most of it is horribly fake. Loves showing my kids what he finds.

I'd rather he have this than boredom, but also it does mean he doesn't need to socialise outside the family. If I worry about anything, it's not knowing and addressing any extreme or views he's lapping up. I know first hand how insular interests can be once you express one on YouTube and it can get pretty shitty pretty quick.

As others have said, this is exactly the same worries we have for our children except I feel we have some control. No devices or screen time and content limits. It's all very easy. It's harder to address that with your parents' parents.