Ok, so I watched the video - and my gut reaction is, I doubt this guy is any kind of a "creeper". He just doesn't react the way someone who is actually guilty would react. If he had taken the pictures with a more nefarious intent I seriously doubt he would have gotten the camera and shown the guy the pictures he took, as it is he reacts like someone who is a little surprised that this guy is so upset and he's trying to show the guy, see - I really wasn't doing anything wrong.
Now as the father of 3 girls yes, I have been known to be a little over protective myself and I don't consider that a vice, but the upset dad here is the one that I would take issue with - it doesn't seem like he provoked this confrontation and video taped it to provide any kind of evidence to the police, he did this so he could be the "hero" protecting his community from this evil creeper. Notice how the outraged dad is careful to say things like "I'm not here to be violent", etc - even though the man he's confronting is obviously in poor health and even mentions that the woman who answered the door is a "caregiver". Obviously the outraged dad here is not saying this because he's worried about the man taking the pictures provoking some form of physical confrontation, instead he's saying that to make himself look more reasonable to the audience since he's aware he's taping this encounter.