The object in the video is hot. Most military FLIR devices can be toggled between "white hot" and "black hot". If you look in the lower left corner of the video, there's an indicator that says "WHT" and the object appears white. At about 12 seconds into the footage, the coloring is inverted and the indicator changes to "BLK" because the pilot toggled it.

The halo is an artifact of the FLIR device. Every FLIR I've ever seen does that in areas where there's a high temperature contrast.