visible flashes

North Tower Flashes and Pops

I've just been made aware of this video:

It's been on Youtube just over a year and I've seen entries for it on sites like Dem. Underground, but I don't seem to find it being discussed here.

What do you all think? It seems to me that the main issue would be: Is the vid authentic? Because if so, it's even more smoking gun proof to our case.

You know what the anti-truthers love to try and corner us with: "Where are the visible detonation flashes in the WTC collapse?"