Thanks for pointing out that view in the clip.
Some questions.
Why shoot out the glass in the window next to the door ? Was the door locked?
The door locked everyday at 9:30 automatically per reports.
I think it’s one of those solid steel doors.
So the only way through it was to go around it and blow out the glass window next to it.
More on it here:
http://www.frequency.com/video/broken-glass-at-front-of-sandy-hook/72154872/-/5-85140