Like most media sites nowadays, if you want to watch the best content you'll need to be located in the same country. This can be frustrating but fortunately there is a way to access anything anywhere by using a proxy server to hide your IP address. So it's possible to subscribe to services like the one demonstrated which will unlock any site by using the appropriate country.
A proxy server is a computer that sits between you and the web site you're visiting. it acts as an intermediary and people use them for a variety of reasons relating to privacy, security, speed and to bypass restrictions. As far as unlocking access to blocked websites, the crucial point is that the web site sees only the proxy's IP address and not the clients. This means that if you use an Irish proxy server, you effectively have an Irish IP address.
This brief video demonstrates using a piece of software to route your connection through an Ireland proxy in order to watch 3 Player which is run by the TV3 network.
It's simple to use and while connected to an Irish server you'll be able to access any content normally restricted to Irish IP addresses. If you need a to watch something in the US then switch to a US server, or a UK server for the BBC etc, it's just a click of a button away.