The solutions for the SuperUser question Blocking YouTube Android app from router are not working anymore.
Which domains or IPs do I need to block to make the YouTube apps stop working, but not the Google Search and other Google Services?
I tried to block some domains as www.youtube.com, m.youtube.com and some more. It stops working in the browser, but e.g. the Android App is still working. The only DNS requests I found in the DNS log were www.google.com, which I obliviously don't want to block.