In absolute, they are orthogonal problems. But as soon as your video platform has user accounts, playlists and comments, they become the very same thing: a PubSub platform with users exchanging different types of contents.
Many of the popular centralized platforms we have today became popular due to integration with standard 3rd-party tooling such as email, RSS... Now that youtube has shut down RSS feeds, i need an account an API key to simply download videos from my favorite artists... or i can parse the website like youtube-dl but then i need to upgrade my code (or dependencies) every few weeks because Google intentionally broke it to prevent 3rd party clients from existing at all.
With a service like Peertube, i can hit the public API directly, and the API is the protocol. So there is technically very little difference between making a Mastodon or Peertube client, and that's why they can talk to one another. But that Mastodon can interact with Peertube is not only useful to users, it's an overall very good indicator that Peertube can be interfaced reasonably-well with other tools/systems because it's a website and websites are intended to be parsed, if only by a web browser.
So i don't really understand your point. Are you against social networking as part of a video platform, at all, and just want a raw content-addressed storage pool of videos (Bittorrent)? Do you personally not wish to use 3rd party integrations (like Mastodon comments)? If so, why is it a bad thing for others?
