After much useless searching, I have finally found a video of the original song used in Manuel Fallmann's flash titled: War.
It's a great flash and I recommend you watch it in awe.
Anyway here's the song called Bak Et Halleluja by Kaizers Orchestra which was used in the movie and "borrowed" by many sites since it's release. I know you probably don't care, but I'm excited.

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Yeah, enjoy it.