Quick shout-out to Grayjay: An app to watch videos on any platform - reducing the power of individual services. The Software is open-source and can be found here: https://gitlab.futo.org/videostreaming/grayjay
I will test this out for myself and hope someone here finds this useful.
Can you import from a newpipe backup?
No, only from an existing YouTube account
Since they encourage ppl to write plugins, hopefully someone will write an import feature.