There is little question but that this object was hovering in the sky. It is not a bird or insect flashing past. It is not maneuvering like a plane or, for that matter, a surveillance drone. It's an unknown. The object appeared in central London, between the Houses of Parliament and the offices of MI6.

This is the comment left on YouTube by the poster:

Friday September 21st, approximately 4.15, in the vicinity of Lambeth Bridge (very close to Parliament, MI6 & MI5 HQ's and Central Communication Command, nerve centre for South London Policing.) Video shot looking North, about quarter of a mile South of the Thames. Object moved very slowly in a southerly direction, all the clouds in the sky were moving eastwards.  Unfortunately i couldn't make out the obeject in the view screen as the sky was very bright in comparison. I stopped filming in order to move to a better position but the object had vanished by the time i got there.
Today, Monday 24th September, i spoke with a coffee vendor who runs a coffee stall on the Embankment next to Lambeth Bridge and he said other people had seen something also. Perhaps the most intriguing aspect of this is in the last miliseconds of the shot. What was the secondary object that flashed across the frame? Perhaps a missile launched at the first object? It is visible for only 3 frames or one tenth of a second.

This could be a reflection on the cockpit window, but given that the pilot noticed it and quickly turned his camera on it, that seems unlikely. From his point of view, a reflection would have been obvious. Too bad he had such a low resolution camera! It's unlikely, also, to be a hoax video, so it's a probable unknown.

Thanks to UFOBlogger.com

There is quite a flap going on in Myrtle Beach, SC. From the description of the movements, there is little question that these are unknown objects. There are many videos of them. For a sample of one, click here.

This object probably is not a bird or an insect near the camera lens because it is moving in a very straight line and is not surrounded by the faint blur of wings generally seen in bird videos. It appears to be a genuine unknown, and a reminder that they are really all around us.

This could easily be a digitally produced hoax, and the lack of any other videos or news stories about what would seem to have been a very prominent event would suggest that this is the case. Also, the video is abruptly cut off before the object does anything. Was this because the animator got tired of extending the image? It would seem that a person videotaping the real thing would have continued until it moved away, and not simply abandoned this incredible sighting right in the middle of the action. Making animations, on the other hand, is tedious, which is why most of the hoaxes we see end abruptly, usually in the middle of the action.

If the object is real, then it is an unknown, and one has to wonder what would happen if such objects appeared over not one city, but ten, a hundred, a thousand?