Watched the video, the shooter should be convicted, he had plenty of opportunity to defuse the situation by simply leaving before further escalation. seems like he hung around to use his weapon, he came to them they did not come to him. These people are really making it tough for those with firearms, common sense and not looking to get their rocks off by body bagging some one. I have been carrying a firearm form many years and never have I put myself in a situation like this and I have had neighbors that had loud parties and guest even blocking my drive way.
I simple walked over found the home owner, and said "hey the music is a little loud and some of your guest are blocking my drive way, can you have the DJ make an announcement for them to move the cars, thanks". They moved the cars but the music did not go down, I called the Police and let them do the job I pay them to do, in my case it's 1 AM people are drunk why go over and trying to rationalize with drunk people makes no sense, its either going to lead to a fight or argument and with most people somebody will get shot.
Common sense really goes along way but I think some people just have this vigilante thing going now and they just want a reason to shoot and because of the interpretation of certain laws they are able to put themselves in situations were you already now what the end result will be. It's obvious he was making sure he was using words to help the self defense cause but its pretty much a premeditated murder masked as self defense, whether he had to or not he had every opportunity to leave, his presence and the brandishing of a firearm as they other guy clearly states he is doing further escalates this.