Rustic, I think I know the film you are remembering. It is footage taken in orbit, and in the background are some intrigueing moving points of light. One of them is seen to shoot something fast towards another one. The 'missile' flies dead straight and is clearly unguided. The other ufo moves out of it's path.
Hard to explain as space junk, but also not what you would expect from advanced aliens. Just another unexplained observation.
Keith.