Could we finally have proof of intelligent life NOT of this planet?

There's a video blowing up on Youtube with a supposed UFO Mothership and UFO fleet flying over the sky's in London.

One thing in this video goes against EVERYTHING I've seen of UFO sightings on video. This video shows these "UFO's" in broad daylight! I mean if these were intelligent life-forms from a different world wouldn't they come at night?

Check out the video and judge for yourself.