In this article[0], it says that YouTube accounts with videos won't be deleted:
> At the moment, Google is not planning to delete accounts with YouTube videos. (That would be tricky as some old abandoned clips might have historical relevance.)
No it doesn't because public videos are designed for public usage. They have comments, are part of recommendations, playlists, and so forth.
Deleting private content and deleting public content are two entirely different things. There's zero reason why the former would imply the latter, and many reasons why it wouldn't.
PSA: If you haven't engaged ArchiveTeam to back these up, feel free to. They have the tooling necessary to rapidly rip entire channels (and define a collection for them) for upload to the Internet Archive. Can't count on Youtube to persist or provide open-ish access forever.
> At the moment, Google is not planning to delete accounts with YouTube videos. (That would be tricky as some old abandoned clips might have historical relevance.)
[0]: https://9to5google.com/2023/05/16/google-account-delete/