Considering the fact that HD camcorders were not produced in 2001. The answer is none.
Of the 19 hijackers. 3 passports were recovered from the debris fields. 2 from Flight 93 in Pennsylvania and one from Flight 11 in New York. The same guys who had booked the flights and seen on CCTV at the airports the fights left from. What do you expect them to find? The passports to Mr Blobby and Spongebob Squarepants?
OK, so from one (?) instance of released footage, we can see a plane swallowed by the building, seemingly from wingtip to wingtip. There is a large explosion, and then the aircraft fuel apparently burns, softening the steel etc etc. After this continual inferno of aircraft fuel, molten steel and any flammable materials inside the offices on those levels, eventually, the tower collapses in free fall spitting out a blast wave of debris, including the said passport?