It's described as (and appears to be) video from a surveillance/security camera. I'd suspect that it probably wasn't being monitored at the time of the attack.
It was a security camera. They are everywhere-take nice pics of crimes as they are happening, but do nothing to prevent them. NO ONE with a scintilla of sense walks those streets at nite-and this was after midnite. There was a recent glowing report on how they want to make the St Claude/Marigny area the new arts district but they HAVE to have security cameras everywhere and not many can afford them. Crime- they said- was the only problem there. The understatement of the millenium.