the lights are fake, this becomes apparent towards the end of the clip. the objects floating around probably are too. i clicked on the "more info" on the right of the screen, none was displayed. so, what do we have here? my opinion is it's a fraud, a fake, a knock off, a cheap imitation.
Those were sprites formed from thunderstorms that had lightning in them. The sprites go up instead of down during electrical activity. http://www.dogpile.com/info.dogpl/c...http://umbra.nascom.nasa.gov/spd/sprites.html
It would help if I knew what the film quality was, what the camera was, what it was actually filming and where, currently it could very well be a microscope watching herpes migrate across a slide. I know that astronauts saw flashes while in orbit when there was sunspot activity, as a result of high energy particles hitting their retinas. A film camera or even a digital one may be the same. The slow moving white object was probably space junk illuminated by the sun.
I don't know the answers to your questions, Odin'Izm, but Marshall Space Flight Center is the place to look to find answers. I think the Marshall video on the top left of the page is a lower quality version of the one in the OP. http://www.msfc.nasa.gov/news/news/video/1999/video99-091.htm Those floating spheres seen in the OP video are ice particles near the shuttle's camera, of course.