It's important to note that currently it's in early beta, and in order to avoid playstore and apple store issues you only have access to a curated list of peertube instances.
So for example you can't connect it to your personal instance ATM... This will be available likely on a fdroid version or more widely after they manage to jump the official stores hurdles.
Personally, I don't this will have much success because titok is driven by algorithms and influencers...it's built for lazy scrolling consumers that follow the latest trends. People that use it don't care about the data privacy or ethics of it, they just want to know what the latest song or dance craze is ... Add to that ease of use to add graphics and music tracks. Also reach is everything.
As I understand your neighbour wants to remove fluoride, can he get an under tap filter that only removes those types of chemicals? If not, why not simply buy mineral/spring water. Where I live it's the same price.
Bucky was right once again with his theory of "Ephemeralization" https://dbpedia.org/page/Ephemeralization ... The only reason we're concerned with these companies employing Devs and spending Billions to do what small teams of FOSS are able to achieve is simply a bad economic system that requires "make work" or Bullshit jobs for wages to feed the parasite class, instead of us living like the Jetson's. Time to move one!
This allows recording? I don't see how.