Silver Orb UFO Disappears Over Rome (Video)

A silvery, rounded orb UFO was caught on video fading in and out of sight over the skies of Rome, Italy. What is it?

The video, posted to YouTube, shows a witness zooming in on an unidentified flying object floating high in the sky over what is reported to be Rome. The witness commenting on the sighting is obviously speaking Italian, but no translation is provided.

Still, it's clear that the photographer is puzzled by what he is seeing. As the camera focuses in on a portion of the sky, a ghostly, silver orb, flashing different colors occasionally, comes into view.

The UFO is of the silver orb variety spotted over Rome in the past, but also the same type which has been appearing all over the world.

The object is rounded and seems to be hovering in one general area before it suddenly disappears from view into a cloudless sky. It doesn't look like a plane or a helicopter and it's certainly not a bird.

So, what is it?

Here's the video: