NRK is the state TV channel in Norway, and as always they will broadcast from the Eurovision 2015 both on TVs and online on their website. So, if you want to watch all your favorite artists from all the 40 nations as they perform online, then you can do so on NRK.no.
What you need for this to work is a Norwegian IP address, and once you have that, you can watch NRK online from all across the world. You can read more about that in my main article here on this page which is dedicated to give out information on how to watch NRK in Norway from abroad, but the answer is shortly to use the VPN services of HideMyAss, the best VPN provider for those who want to watch NRK online from outside Norway.
Once you click the button above you will be sent to the HideMyAss website where you can sign up for their services, and once you have done so and downloaded their program you can connect to a server in Norway, and then you will be able to watch Eurovision 2015 online on NRK.no, wherever you are in the world.
Read more about Vienna and what is going on in the Vienna Guide.