In 2001 cellphones didn't have cameras on them. CCTV was reserved for bigger operations as it was a lot more expensive to install then than now. So, I wouldn't expect any footage from those sources. There are however, a lot of govt buildings with CCTV all around the PEntagon and their cameras should have caught something. Yet we've seen nothing. It wasn't a 747 that supposedly hit the Pentagon. AA 77 was a Boeing 757-223.

All of that aside, I knew people in the PEntagon when it hit, worked for someone awarded a medal for pulling people to safety, and have friends and family surrounding the Pentagon. No one saw any plane.