These photos are easy to explain. Example: if you film a jet very far away, it looks like it is hardly moving. If you film next to the runway, the jet could be a flash in your film and possibly out of focus. Distance, speed and respective are hard to determine in a film. Space is also littered with manmade space junk and natural debris from meteorites and small particles. Now you put a cameras in space traveling at a high speed, you are bound to pickup something. Even filming outside when not moving, bugs can ruin a photo.
Oh, as for visible intelligent life out there, if there were any - why would they bother coming to earth?