Randy Halverson captions his video:
What you see is real, but you can't see it this way with the naked eye. It is the result of thousands of 20-30 second exposures, edited together to produce the timelapse. This allows you to see the Milky Way, Aurora and other Phenonmena, in a way you wouldn't normally see them.
Phil Plait applauds:
I love the meteor at 55 or so seconds into the video that leaves what’s called a persistent train, or a trail that lasts for several minutes. In the time lapse you can see the vapor trail twist and turn as high-altitude winds push on it.