Again, you put your faith in youtube videos that could have came from anyone instead of what the experts think.
http://www.civil.northwestern.edu/people/bazant/PDFs/Papers/405.pdf
This paper gives their reasoning why all of the WTC buildings fell and it was written by an engineering expert.
Look at this photo here:
http://www.kolumbus.fi/av.caesar/wtc/wtc7_2.jpg
As you can clearly see there has been significant damage to the building.
Anyone can see from this that the damage should be enough to bring down the structure.
What I do not understand is if the govt is behind 9/11 why would they have brought down WTC 7 at all? Most people didn't even know of the building until these conspiracy theories started popping up. It would seem that they were just simply putting a target on their back if they decided for no reason at all to bring down third building. Again, there was NO reason to bring down this building.