Just downloaded it and it works, thanks!
I just read up a bit and realized that PipePipe is a fork of NewPipe. In other words: NewPipe is the original 🤯
PipePipe's GitHub page says
Making a hard fork allows us to effectively address issues with quick fixes and maintain frequent feature updates
It's ironic that PipePipe was forked to adress quick fixes, and not it appears to not work at all (for me) while the original NewPipe does work.
On my mobile device NewPipe works but PipePipe does not.
Just checked, the latest PipePipe version in F-Droid is 5.1.1
On GitHub, the latest release is also 5.1.1