I've been successful in removing what's visible on my channel page (e.g.
https://www.youtube.com/channel/abc123), by adjusting my privacy settings.
However, some activity of mine from a few years ago is still publicly visible under my user profile page (e.g.
https://www.youtube.com/user/username). The two different pages seem to have some independence from one another.
Can anyone please help me out here?