I’m using this all the time myself. There is no login to YouTube required and it supports adding subscriptions and doing everything important you can do on YouTube.
And the best part is no ads whatsoever.
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I don’t subscribe to anyone, but have donated to the authors I like, just as I did to the FOSS projects I use. One blogger even has a site where you can tie your donation to a specific video of his.
And for Youtube Music - RiMusic does just what you described but does not require a Google account or a recurring payment.