Athough this clip is short (taken while in traffic), it is similar to many other such objects captured on video that have no visible aircraft in front of the contrail/plume. This is the second one in a row that I witnessed, yet only captured this one on video. These usually have a short plume and travel in one direction, as opposed to others I’ve captured that fall from the sky in a corkscrew pattern before gaining control and shooting off to one side in a straight line, or ones that simply spiral down to the ground. The one captured in this video has been shown in other videos (not cpatured by me) to have a glowing orb in front of the plume as well. Although, in addition to no visible aircraft, there was no visible orb in front of the plume.