Upon further analysis, it appears the NBC4 live feed (see 2nd half) that aired on 9/11 minute(s) before the 2nd hit did not originate from the TinaCart1 building, the place were three "amateur" shots of the WTC crashes emerged.
The shot appears to have originated higher and to the right of the TinaCart1 building at 475 Kent Ave, Brooklyn. My best guess as of now is that the NBC4 shot may have originated on top of the Gretsch building.
This shot has a lot of mystery to it that may yet still yield a smoking gun. As far as I can tell, this shot only aired once and it was airing live right before the 2nd WTC crash which means it should have captured the 2nd hit. Were was this shot located? Was it from a network camera, or a non-network camera atop some building that the network tapped into?
This "Tony" sounds just a tad suspicious because he sounds a little too over-emotional on the phone compared almost all other WTC witnesses being phone interviewed live and, coincidentally, describes the first plane as a Boeing 737 which is the same exact plane described by another rare and suspicious 1st plane eyewitness, CNN VP Sean Murtagh (also @4:38).
(Update 11/08/08: Questions about Gary Welz moved here.)