The idea is great, and it's nice to incorperate live action into a flash, however, since you used youtube, the player is at the mercy of the processor speed moreso than normal. That being said, a lot of times, the video feed glitched and due to the short window allowed to shoot the guys, one second you are waiting for them, the next they shot you. This could be better done if the guy took time to aim rather than shoot wildley at you (pop out, pause, then shoot). In reality, that's what had to happen as you'd never guarantee a hit like your game intales. Also there are 6 shooters and 8 shooter revolvers. you seem to have a 5 shot revolver programmed (sorry if I miscounted)
Another little quirk I noticed in your game is that your hat is backwards in the first scene. It's a little obvious given the close up.
But to end on a positive note, I like the concept and also I quite enjoyed the title transitions. It was quite refreshing