Most servers are not able to access the Google API.
Invidious report of the same(ish) problem: https://github.com/iv-org/invidious/issues/4045#issuecomment-1674373088
You dismissed the idea as if it weren’t possible without engaging with it. It would be possible. I’m not developing the app so I don’t feel the need to provide a detailed plan but these all are solvable problems. The biggest issue keeping it from being a reality would be the legal one.