the animation is pretty and each individual model rather cute, but the first half of the video is relatively dull and uninspired. the feel is definitely there and right, but i think that something more could've been done, or been in the back or foreground, to justify the length and make it feel less like filler.
on the other hand, i thoroughly enjoyed the second half, even though the model for all the vehicles and the fires is essentially the same. although i do think that changing Spot's gait a bit throughout the animation might also help, i also kinda like the fact that by not doing so Spot just kinda goes--same as when he was looking at the initial car accident--"whatev's" and just keeps on trotting/jogging along. i gotta admit i was laughing like a maniac, but then, i'm just twisted like that. lol
i compliment your choice of music (god, i've never even heard of electro-swing before), and goodness knows i appreciate it, but i can only give so many props based on that alone. on the other hand, judging from the actual animation quality, i'd say you're already doing pretty well.