This video was created by Bloodvein and Myndflame on behalf of Skill Capped. Cottage is a restoration druid gladiator who is widely known as one of the best PVP players in Europe. He'll be starting a death knight and going from a brand-new character all the way to Gladiator inside a single season. You can find out more at Skill Capped itself. I've watched this movie in its entirety, and I'm pretty excited to see where the whole series goes. Cottage is definitely putting out some worthwhile analysis, and both new and experienced players can benefit from the information.
If you decide you want to try out the Arena and PVP, make sure you take a look at Arena Junkies. It's a community site that's been around for a while, and many experienced PVP players post to the forums. While it might take some work to find the best information, AJ is definitely a great first stop as you're getting started with the Arena.