I watched that whole video and found it pretty interesting. I'd never even considered Sandy Hook as anything other than what was on the news but now, i gotta admit. He did raise some very interesting points.
The majority of it was conjecture and a bit of a stretch but as a father, I cant imagine how anyone can be laughing and smiling the day after their child had been supposedly killed.
The whole thing about the lack of children/emergency workers etc was a bit creepy too.