There's no such thing as aliens. What is the likelihood of mankind creating this kind of technology? If it were piloted, not high. The rate of accelaration would be too extreme for a human passenger. That leaves a few options. 1. It's a hoax or elaborate lighting system. 2. It was unpiloted human technology or 3. Spiritual occurence. It'll be interesting to see what sort of answers the boffins come up with.
I disagree, I can't believe for a second God made this vast universe and left it empty.
But as for the video? I doubt it was aliens, well maybe the Goa'uld.