If you don't mind paying a bit, I'd recommend you investigate a premium VPN service which will give you access to content around the world. (I'm not sure if they work on the RPi, but on Windows, Mac and x86 Linux they certainly do). These tunnel your internet through a server in the country of your choice, giving you an ip address in that country so that it looks like you reside in that country. I've used several in the past and can confirm that you can access iPlayer and other UK video streaming sites, as well as US networks, Hulu etc.
(There are other benefits to using a VPN which I won't go into them here. Your investigation will uncover these.)
I currently use https://www.privateinternetaccess.com/
which works very well and is quite inexpensive at $39.95 annually. (I am not affiliated with them in any way other than being a subscriber.)
They currently have gigabit servers in the following locations and you have access to them all:
United States (US VPN)
Canada (CA VPN)
United Kingdom (UK VPN)
Switzerland (Swiss VPN)
Netherlands (NL VPN)
Sweden (SE VPN)
France (FR VPN)
Germany (DE VPN)
Romania (RO VPN)
Of course, there are many other similar services so here's a list you can investigate:
IMO, it's money well spent. My wife and I haven't had paid TV for 2 years now and really haven't missed it since we went the VPN route.