Luminous Cloud Ring Anomaly 2010 Indonesia
Unexplainable activity seems to be occurring within this giant luminous cloud ring which seems to obscure something which is emanating light - the rim of the cloud, which is slightly elliptical, is dark and tattered, whereas the inner part is extremely bright and seems to have some radiant source within it. I have seen another clip of this where another source of bright light is seen pulsating to the right of the cloud in this clip, which shows that the source of the emanation is definitively not the Sun. - Other cases have been filmed in various countries - inlcuding Russia and Romania.
Related Links;
Daily Telegraph