googlevideo.com redirects to https://www.google.com/videohp This simply is Google’s video search site.
Do yourself a favor and make a grep -r "googlevideo.com" . on the NewPipe source code. The domain is nowhere to be found. Blocking this domain does nothing. You still can search for Videos and watch them. Your statement is still wrong! Have you actually looked at the link I mentioned?
I know how proxies work. That’s why I said, using NewPipe with a VPN achieves the same. What you don’t seem to understand is that someone has to host and pay for these proxies. Neither these servers nor the bandwidth is for free or pop out of thin air.