Thanks to @ella for telling me how to uninstall ununinstallable Android programs.
After uninstalling YouTube that way, I was allowed to re-add youtube.corn URLs to NewPipe, making them usable again.
Thanks to @ella for telling me how to uninstall ununinstallable Android programs.
After uninstalling YouTube that way, I was allowed to re-add youtube.corn URLs to NewPipe, making them usable again.