No offense...But that was weird.

From a story-line stand-point, the first part makes sense, but the external lights beating with the music was a bit off.
And the people's doing nothing about the zombies, and then NOT RUNNING FOR THEIR LIVES, but instead just changing their faces and continuing with the swaying was a bit too much for me. Sorry. Sure it set up a nice heart-warming ending, but it was quite forced. But hey, it was Lego's script right? Nothing you can do about it, so just blame it on them.

Production-wise, it relied way too much on CGI, even going so far as having easily animated scenes CGI, while the hardest bits (Crowd scenes) be stop-motion. It's like they only wanted to build the one set, but then make a whole film around it. The animation was great, and the crowd shots were very impressive! (Was that all animated at once, or did you film various aspects and then stitch them together in post?) 

Well, wait, before I go any further, which parts did you do, and what did Lego fill in?
I'm assuming you did the stop-motion parts, and TLG did the rest, but I may be wrong.
If so, just say so. I'm prone to jumping to the wrong conclusions.

It's a music video, I caught that much. And if I must say so, while the production aspects of TLG's music videos have been high, the music itself is always lackluster. (IMHO) There was absolutely nothing about it that even hinted at zombies, and it just didn't appeal to me at all. And those weren't even zombies, they were Trolls/Orcs.

So yeah, it's a so-so song, some thrown-in stop-motion bits, a bunch of CGI and a forced ending.
While I was impressed with the crowd animation, I can't say the some for the overall video. Sorry.