Okay, at first I couldn't really get the concept/story of this video but after a few re-watches, I can kinda see what point you were trying to make. Here's some pointers I'd say you could improve on:
1.Didn't like the er..yellowy/orangey/sepia colour overlay near the beginning.Basically I didn't understand why it was there because if it was really to create a sunset colour feel then it didn't feel quite right because Mikado was underground.[I know, I'm picky

]
2.Editing was alright, the zooms and some blurs looked kinda good. But your scene selection was really really weird because at first you made it all depressing but then Celty looks kinda happy in the midst of all this

So I was pretty confused,[I mean if you made Izaya like that then I'd understand because he is a tad psycho

] especially since I thought the concept was to show the hardships of human life and then show how they overcome it in the end. But I liked the scene selection in the 2nd half though where you added the text, that part was done pretty well although I should say a better font choice and perhaps moving the location/or making the text more noticeable would be better because I didn't see it at first ^^;
3.The quality wasn't horrible, but there's quite alot of blockiness here and there which made it a bit ugh.

Also why .wmv? ;__; wmv is crap, use Zarx and compress to mp4 instead for much better quality. ^^ If you don't know how to here's a good
guide for it. If you still need help give me a PM, I'd be happy to take you through the stages.
I'd say overall, it was an okay watch though because I LOVE Durarara and I love the song too.

Good luck with future video! ^^