If a video shot is so short and distant that there is no time to observe any movement it is effectively the same as a still shot. Also a lot of judgments on these threads are being based entirely on still pictures.
Even if we had a fairly long movie of this event, it is possible for a plane to become separated from its contrail. And a rocket plume will end when the rocket runs out of fuel. So a movie may show nothing more happening than a still pic does.
If it is possible that the two phenomena could be confused, it is not safe to state dogmatically what the picture shows without further info.
You’re avoiding the point I made.