Being the epic final adventure that the Lich King is, we got this recorded from THREE(!) perspectives. It was then cut into two separate movies:
Both have spoilers if you don't want to see what ultimately happens at the end. The Priest/Pally video contains the cutscene and some pre-story as well.
They are currently hosted on YouTube, so I'm linking them in here to share the hard work our three cinematographers put into these videos!
~~If you have any strat specific questions, we have at least two bloggers working on making strat guides ATM, but I'm more than happy to answer questions on what we did to the best of my ability!~~