I’m not sure why this problem has come up for you, but you may find a solution by installing the Hola addon (Firefox or Chrome). It allows you to pretend you’re in another country which might just solve your problem (great for Netflix, too!).
Yes, I am banned from BlenderNation, but I still have to go there because it’s the de facto official news site for Blender and where all the program update news is posted. (Adventures in Blender is better for other Blender videos, though.) So, like RonTarrant, I’ve also just used Hola to get around the ban.
If it’s an ad blocker that’s causing the problem, try Ghostery (Firefox addon). As long as you keep your settings up-to-date once in a blue moon, it works well and won’t block you from sites you want to visit. When it does, I just update my settings and everything’s fine again. I haven’t had to do that for a long time, so it’s quite robust.