Formation of energy balls of light captured with Infrared camera over San Antonio, Texas

On this video you will see a formation of what appears to be Energy Balls of Light traveling over San Antonio, Texas on Aug 30, 2014.

At first they seemed to hover as the clouds pass underneath, then they appear to be high above the clouds and they seem to be emitting some kind of glowing energy till at some point they began to travel until out of sight.

In my opinion these objects were clearly no birds as birds always fly in a V-shape and I do not see the typical flapping wings.