This is the description from the guy who posted the video:
I had a couple friends over at my place. While I was out smoking a cigarette I thought I heard some knocking but wasn’t expecting anyone so didn’t think much of it. The knocking turned into a couple bangs, I look out the peep hole and saw a guy with a mask and his lil friend behind him. I locked the door thinking they’ll hear it know someone’s there and leave but they didn’t. So I went and grabbed my rifle. Extremely thankful I got to the door when I did. VERY glad I had it. Never get to comfortable thinking nothing can happen, stay safe out here how ever you see fit.
there was no trigger pull.
One of the features of an AR-15 is that it is easily recognizable and two criminals who just kicked in a door who find themselves staring straight down the barrel of one have little choice but to turn tail and run if they don’t want to die.