It is not possible to block youtube ads. The video ads are on the same domains as the main content. In the past the IP for adds were different so it was possible to block those. Also the connections are encrypted so opnsense has no idea what is sent. Afaik this is only possible using browser plugins (ublock origin). The session at this point is decrypted.
You are right, i was not crystal clear. Blocking at Apple stuff and native youtube apps is afaik not possible.But browser stuff is possible.Thanks for the tip. Did not know SponsorBlockYou prefer SponsorBlock? Or do you also use uBlock Origin? Both seems open source.