That a very interesting video you have there.
It says the 7th in the title but in the video information area it says ‘filmed last light’ and the upload was on the 9th. It could match by date.
If its the same event it looks like it was shot from north Malibu maybe Ventura.
As a professional videographer and someone who has seen more than a few launches, I’m convinced it was a rocket moving away from the camera.
If that is the same event, the plane theory is dead. Missile arcing toward the setting sun. Arcing west, not east. At any rate, if you know anything about lighting at all, you know the plane theory is dead.