Confirmed on my side. Doesn't work on UniFi, works perfectly via SSH tunnel. Also, I've noticed that if I WHOIS the IP address of the CDN server, it's a TMNet address.

I've tried blocking TM's CDN

and making it directly go to Google (173.194.38.132), but looks like it's still blocked.

Can someone try sending the request for the YouTube video to some random other server? I want to see if that gets blocked.

Also, time to tunnel everything via SSH to my VPS in Las Vegas.....

Yup, is Las Vegas enough to tip you off on that?

From what I know, there's really no way to block specific content if it's going over HTTPS. You could block specific IPs, or even every site, but you can't block specific pages of an IP, or see what's being transmitted.

AFAIK, there's only one way of monitoring the contents of an HTTPS connection, and if they did that, it would throw up a security warning on everyone's computers, unless there's some massive conspiracy to stick their SSL certificate on every PC.

Because you can't block just one page with HTTPS, you either block the whole site, or block nothing.

Just a note on this.
It shouldn't matter what DNS servers you're using, as the blocking method used here is more advanced and different than the method used for the file-sharing blocks.

It's not GeoIP. There's a computer between us and YouTube/Facebook, that literally looks at every piece of data being sent, and if one piece meets their criteria, the connection gets blocked.