Just use search for UK, US, ... anonymous proxy servers with google.

p.s. It is very hard to find a free proxy server that will work with online videos. Also note that if you use the proxy server for other things like checking your e-mail, there is a risk that your passwords and other personal information will be captured. When you pay for a VPN, you should also take this into account. I recommend to use large VPNs like StrongVPN and HappyVPN. But even if you use them, I suggest to use secure protocols like HTTPS for accessing and sending private data.