Ublock Origin is sufficient to block all ads on youtube.

You're misunderstanding the problem.

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.