FLIR camera footage of twin towers shows low fire temperatures

This newly released FLIR camera footage is remarkable! It was taken around 9:18-9:19 in the morning on 9/11 which is about 15 minutes after the second plane strike.

I'm no expert so I'd like to see some expert analysis of this video, but from what I can see, it looks like the fires are about 100 degrees Celsius which is about 212 degrees Fahrenheit. Now, of course, this contradicts the widely held belief that the fires were a "raging inferno" reeking havok on the building's steel columns.

Lest you think that this FLIR camera is not calibrated right... on the video itself the FLIR camera reads a "Background Temperature" of 23 degrees Celsius which is about 73.4 degrees Fahrenheit. I looked up online the historical weather data from NYC on September 11th, 2001 and it shows that the mean temperature was a nice 72 degrees Fahrenheit (min 64 / max 81) which fits almost exactly with the reading on the FLIR camera.

http://www.wunderground.com/history/airport/KNYC/2001/9/11/DailyHistory....

Another piece of evidence also points to the fact that the fires weren't hot enough to cause the buildings global collapses. I've gotten the FDNY Port Authority Radio Recordings from 9:30-10am and at about 9:50 am this was recorded (7 mins into the video):

Battalion 7 Chief: "Battalion 7 .... Ladder 15, we've got two isolated pockets of fire. We should be able to knock it down with two lines. Radio that, 78th floor numerous 10-45 code ones."

Sounds to me like Battalion 7's Chief saw that the "two isolated pockets of fire" were maintainable if they only needed two lines to fight it.