Thanks for these instructions. I wiped out all the other things and added the A Records as needed. Each of the five zones looks like this.
And I can login and browse youtube with no issues (forced restricted, but videos play, etc), but every time I've tried to navigate to video from any of the links I've tried from a curriculum, I get the error, "This video is Restricted. Try signing in from a Google Apps Account." But I am signed into an account - this would be expected behavior if the video had bad content.
An example link is debit cards vs credit cards. No idea why this video would be blocked -https://www.youtube.com/watch?v=oJtecS-DVkc This video is nearly identical, but not blocked.