Building 7 collapse foreknowledge - what does it really tells us?

After seven years, the sudden collapse of WTC Building 7 on the afternoon of September 11 2001 remains the most controversial "smoking gun" of the 9/11 truth movement. The appearance of yet another another video indicating foreknowledge of the collapse of Building 7 drives another nail in the coffin of the official NIST finding that the collapse was an essentially random event.

Yet there is one possible explanation for the foreknowledge which has so far been neglected. We have the testimony of Barry Jennings that explosions were taking place in WTC7 in the morning, well before the towers had collapsed. These explosions early in the day may have resulted in the building becoming "unstable" - and thus would have fed reports such as the above that rescue workers were concerned the building might eventually come down. Thus the supposed evidence of foreknowledge may have an innocent explanation, and we should be cautious about pointing the finger at those who may have in good faith made statements about the building's impending collapse.

It may be that WTC7 was meant to come down just after the collapses of the towers while shrouded in the dust cloud. If it had happened this way we would never have seen the collapse at all. 

The primary evidence for the explosive demolition of the building is the actual collapse footage, which proves that the building collapsed in freefall. This is all we really need. Evidence of foreknowledge, while interesting, is less powerful than applying established laws of physics to verifiable live data. We really need no more evidence than this.