Many eyes and cameras were pointed at the sky awaiting the Delta V launch. However, a few minutes before the launch, this object appeared in the sky. I just thought it was a jet and filmed it to show the "twilight effect" we normally see with rocket launches. But there is much doubt it was a jet after reviewing the footage. The contrail was VERY bright and much brighter than other jet contrails that were present at the same time. There were no navigation strobes seen either. What was this?