The best solution on iOS is Yattee. You can add Piped or Invidious instances as locations and stream ad-free YouTube from there. Another solution that doesn’t involve Piped and Invidious is AdGuard. Open a YouTube link in Safari, hit actions, then hit Block YouTube Ads (by AdGuard).
The fact that Firefox isn’t listed as a browser alternative but Brave is throws any credibility that this article might have straight into the garbage.