I thought the question was more about media in general, not about Youtube channels in specific.

But I live in Germany, the collaboration between public broadcasting and Youtube creators is called Funk. They occasionally broadcast stuff on the speciality channels and some creators landed a show on the main program, resulting in shows like MaiThink X. Though that kind of stuff is then in turn sometimes not published on Youtube, since they want to promote their own internet streaming platform, called "Mediathek". And you're going to have a hard time accessing all of that unless you're inside of Germany, since they use geoblocking. We also have a few other nice shows on public TV, like Feuer und Flamme, some satire / late-night shows, content for children, good regional news etc.

And the products I see from Youtubers and podcasters (" Influencers") in the library (or bookstore) are mostly books. Like cookbooks, sometimes novels, or they'll write some long form essays about the same thing their regular content is about and they'll try to make some extra money by selling books to their fans. I don't think they do DVDs. Most people are still on Youtube or TikTok and borrowing discs or watching linear TV is too cumbersome for their target audience.