Today's video is a fan trailer for the upcoming patch 3.3. You might have heard of it. A few million screaming Alliance and Horde are going to kick down the door to Icecrown Citadel and have a few words with the Lich King. Those words will probably be things like "Oh, god, my face!" and "Not the bees!"
This patch 3.3 fanmade trailer doesn't use game footage or new voice acting. Instead, Daneimp went into the archives from previous Warcraft games and strung together a series of official Blizzard cinematics. He's basically outlining the story in a montage of Arthas moments.
While I don't think trailers like this fall within the realm of machinima, I always get excited to see videos created by players who are just as psyched about new content as I am. You don't do this kind of thing because you're bored on a lazy Sunday, and looking for something to kill a few hours. And, at the end of the day, Daneimp's video was fun for a few minutes, and I share his enthusiasm for the new content.