Warcraft is large, if I'm in the mood to be understating the real truth. If you feel overwhelmed by the decades of lore that Blizzard's built up around the game and have only scratched the surface of who did what and why this is here, then we have a way to help you get a handle on it all.
In just a little over 40 minutes, an annotated video covers the highlights of the entire Warcraft timeline and universe. Even without going into great depth, it's an excellent crash course for the aspiring loremaster. It's too bad you don't get an achievement once you've mastered it! You can give it a watch after the break.