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
Well, if they implement their web integrity DRM thingy in Chrome and Youtube then that will prevent anything that’s not a real approved browser from accessing the website, and with that the video streams. Not only Piped/Newpipe, but anything automated trying to access any website will be automatically locked out unless the website approves of it. New search engine bot? Archiving crawlers? Any type of third party program that accesses some website’s content without approval? Dead.