No, Skytube doesn't use YT's subscription and recommendations. You locally set your subscriptions and the app checks for updates occasionally or when forced, no account required, no server-side profile (well, they could, I'm sure you stick out like a colorful bird using that client), no YT-defined sorting of what might interest you. And it has a bookmark & download function built in. I'm somewhat of a fan as you can tell, there's more on https://skytube-app.com/ and you can install it via F-Droid.

They do have a Trending page as well, but I don't know how that's calculated. It's very random, has nothing in common with YT's Trending page, and I don't use it.