I'm in the US, but when I load www.funimation.com over IPv6, I get the "Sorry, this video is unavailable in your territory." error when trying to watch episodes in the free player. Specifically, Jormungand episode 17 or Psycho-Pass episode 4.
If I configure Firefox not to load www.funimation.com over IPv6 (network.dns.ipv4OnlyDomains) or disable IPv6 completely (network.dns.disableIPv6) it works perfectly fine. I've tried reloading numerous times with IPv6 enabled, so I'm almost certain this is not just a bizarre coincidence.
I first noticed this a couple hours ago. For what it's worth, the last time I'd watched a video without this problem was the aforementioned Psycho-Pass episode at about 2012-11-07 02:00 UTC. (The election interested me, but not the TV coverage!)
I don't know if you only recently enabled IPv6 or if it's been enabled longer but used to work. If you didn't know you had IPv6 enabled, go ask CloudFlare. ;P Maybe they turned it on by default.
My IPv6 IP is 2001:470:5:932:2e0:b8ff:febb:161b, and all of 2001:470:5:932::/64 is mine*. (It's a Hurricane Electric tunnel using their Miami, FL, US tunnel server.) For what it's worth, MaxMind's free geoip database seems to geolocate HE's whole 2001:470::/32 range to the US. (Which is not entirely correct, since they use it globally, but I'm not going to look a gift horse in the mouth.)
* I hope that's not a violation of the forum's personal information rules. This is the Internet, and that's a static IP assignment. It's public information, and I don't pretend otherwise.