Unlucky for the 16 year old robber. Fucked with the wrong dude apparently.
Both of the boys were encouraged and directed by two older men both of whom are now in prison for doing that.
You are correct though, if there is a lesson learned it should be by potential armed robbers, you might fuck with the wrong guy(s) and shit can go downhill in a hurry. Regardless these kids would have been caught anyway because of the video, that is how they caught the other one.