For that I'd suggest different approach: using FreeTube[1][2] client which carries subscriptions locally; you can export and import channels in FreeTube format, NewPipe and OPML. FreeTube uses invidious to fetch and play videos - among other two players; it's also possible to change the instance in case of any issues. Sadly, I can't tell if it's possible to import YT subscriptions since I don't use the service with Google account for years.

[1] - https://freetubeapp.io/

[2] - https://github.com/FreeTubeApp/FreeTube