Use DNS to force youtube into restricted mode - and Pi-Hole

Hi,
I just set up pi-hole today so I'm still learning a lot. I'm trying to force Google and youtube to safe search. Attached is an image of my 05-restrict.conf file and my /etc/hosts file. I've also set up Bing safe search.

Bing safe search works. Google and Youtube do not block anything. Searching for 'Porn', 'Nude', etc bring up what you would expect from Google and Youtube while Bing tells me I"m under protected search.

For testing whether it's working I've flushed the cache of pi-hole and tried using Firefox and Chrome in incognito mode to make sure nothing was cached.

Any ideas why this configuration is not working for Google and Youtube?