• You can’t block youtube advertisements with pihole. At least not reliably, and at least not “in video” ads. It’s hitting a moving target, and probably not worth the effort. You also will probably be able to block some small chunk of them, but far from all youtube ads. And even then, they’ll eventually just change it so that if you try, it’ll break your access to youtube videos, too. Of course, the current pihole regex to block ads also already blocks some videos, too, anyway.