For blocking some services such as YouTube it would be helpful to be able to configure the redirect domain/IP address when using regex filtering with FTLDNS.
At the moment BLOCKINGMODE only has options for using PiHole’s IP and built in web server, but for YouTube and doubtless other services that causes problems. To effectively block YouTube ads we need to redirect all YouTube ad servers via regex to googlevideo.com (or one of its IP addresses).
Simply blocking these servers causes the YouTube app to keep trying different ones endlessly and the video does not play. Redirecting to the PiHole web server does not work because YouTube uses HTTPS and probably pinned certificates too.