Just to answer the question about visibility of a rocket launch from Jacksonville operating areas, rocket launches at night are easily visible from Jacksonville. I grew up there and saw numerous night launches in the 1970s. Some of them were quite spectacular. There were even more readily visible from the beach, where you did not have problems with trees or other obstructions. It is an interesting theory (atlas rocket launch) but I think the only way for this to be the source would have been if the rocket was downrange at the point the video was recorded. The angular motion would have been significantly reduced at that point.