I just got this video yesterday. It was from the roof of WTC North Tower with all the antennas on it, taken just a couple months before the attack. Here is the youtube description:
This is a RAW UNEDITED video taken from the roof of the World Trade Center North Tower, Building #1, on July 15th 2001. Shown in the video is my friend Rod Coppola, a broadcast engineer for WNET Channel 13, who worked on the 110th floor and lost his life on 9/11/2001 in this very same building. The recording is jumpy and the RF interference from all the transmitters caused the video to breakup as well as causing the audio noise. The general public is not allowed on the North tower and most videos you will see are from the south tower, so this is a RARE video.
On Sept 11, 2001 at 8:30AM, I signed online with Rod using AOL IM discussing software changes to a program we were working on. Then at 8:46 the connection was severed. I had no idea what was going on until 15-20 minutes later when news of a "small plane" hitting the building was broadcast on the television I was watching. The rest is history. His body was found in a stairwell on Christmas Day 2001.