Looking for a short film

Hello, maybe you can help me.

I'm looking for a short film I saw once but I don't remember its name. It was an action film in a modern setting. It had two rival gangs fighting each other with swords. Not samurai swords, more like european longswords. I think there was also something about two brothers, one of which had a best friend in the rival gang or something. In the end the one brother fights the other's best friend on a rooftop and they end up killing the brother that comes to stop them from killing each other.

Where else would you recommend I look? Where else can I ask?

Thanks!

This is more of a You Know That Show question.