"This was filmed while walking our dog in Kingsnorth Gardens Folkestone, Summer 2010.
The picture is joggy but it was not a bird, plane, helicopter or anything explainable.
If you pause it occasionally you can see the shape of the object." end.
Conclusion: after analyzing this footage we are left in no doubt that it shows a genuine unidentified flying object; something that is way too big to be a bird - that appears to be generally disc-shaped, but which is morphing in flight
Screen shot and darkened enlargement of object