In fact, I actively search YouTube to watch things in languages I don't understand for audiences whose demographics I am outside. I passively get enough age-appropriate comprehensible-language content just by living in my own society.
Edit: After a quick calculation, I realise I have watched music from 1943: "Blood on the Risers", "Lili Marleen", "Zog Nit Keyn Mol", "Bella Ciao", and "Катюша" are all suitable for 90-year olds to have encountered as young teens.
Well you're an extreme outlier. Typically people want age-appropriate content in a language that they speak, or, which at least has subtitles. As you point out, if this is your preference then you can use search functionalities for this purpose.
a few examples:
https://news.ycombinator.com/item?id=23640033 (9 year olds, RU)
https://news.ycombinator.com/item?id=24431001 (CN, IN, RU, US)
https://news.ycombinator.com/item?id=24398456 (JP, SU, US)
https://news.ycombinator.com/item?id=24156310 (caucasian variety)
Now I realise I should seek out 90-year old appropriate programming. Anyone have any hints?
Bonus clip: https://www.youtube.com/watch?v=y2fNVztaC58
Edit: After a quick calculation, I realise I have watched music from 1943: "Blood on the Risers", "Lili Marleen", "Zog Nit Keyn Mol", "Bella Ciao", and "Катюша" are all suitable for 90-year olds to have encountered as young teens.