UFO's spotted over Denver during game

This video has been sped up, but even at normal speed it is interesting.
Witnesses claim that these lights did not behave like planes or helicopters.
Quite a few sightings turn out to be lanterns with led lights or candles in them,
but these seem to be moving too fast for that, the only way that could happen is in
high wind, there does seem to be wind blowing if you look at the flag on top
of the building, but you would have to match the direction and speed of the wind
blowing the flag with the moving lights, does not seem to match, which makes this
a very interesting bit of footage.