Provide the Safe Search URL/CNAME support

This article explains in detail how to use redirects or CNAMEs to enforce certain safety levels on Google, Bing, and YouTube. Here's the YouTube one:

 For youtube, add a CNAME for the following records:

• www.youtube.com
• m.youtube.com
• youtubei.googleapis.com
• youtube.googleapis.com
• www.youtube-nocookie.com

And point them to:

For Strict Restricted YouTube access, add restrict.youtube.com as a CNAME for these domains. For Moderate Restricted YouTube access, add restrictmoderate.youtube.com as a CNAME for these domains.

It would be nice to simply have an option to enable or disable this with a check box or radio selection. The ability to transparently deal with YouTube this way would be huge for our family.