Earlier quoted context omitted.
DNS blockers aren't good enough to block all ads. Especially YouTube. Plus, many browsers will ignore DNS without configuration and same for phone apps. While this can be fine for me it's not for everyone else in my family nor guests. And that's before we talk about Apple... If anyone has a solution I'd love to learn.
Ublock Origin is sufficient to block all ads on youtube.
We were talking DNS blockers. The context matters. I already use ublock but I can't do ublock on my pihole. I can't do it on an iPhone (I can use orion browser but YouTube quality is low). I can't do it on my TV. I can't do it on my friends computer that visits my house. And so on. I appreciate you trying to help but you're misunderstanding the problem and honestly I don't know how someone could be on HN and not know about ublock.