When the title says "yours" it means marketers, not You the Lemmy user. This is a blog post by a SEO marketing person for other SEO marketing people.
A more apt title for the general audience would be "It's Not Google's Fault. It's The Fault Of The SEO Spammers."
Everyone has different preferences for their YT proxies. And well, "nsfwyoutube.com" does not sound like the most reputable one.