UFO Cloud Over Moscow?

A strange video has surfaced from Moscow. What seems to be a halo-type cloud hanging over the city. UFO conspiracy theorists are climbing out of the woodwork.

After viewing the video it does not seem to be doctored in anyway but could possibly be just some sort of weather pattern or anomaly. I believe this might be the first for this type of cloud anomaly, can anyone disprove this?

So I am asking you to take a look at the video yourself and you decide if this is real or fake?