Uploader says

Filmed in Adelaide South Australia September 25 2011. Started off as 1 single light then grew until several lights could be seen. This thing was extremly bright when it wasn't dimming, extremely large and very low to the ground before vanishing. About 45 minutes later there were a convoy of helicopters, a couple planes and a military jet in the area and surrounding area scouring the sky until shortly after sunrise. I have never wittnissed such a display or anything like this before.