UFO or Mirage Over Iceberg?

Last week the internet was a buzz with a video of what appears to be a UFO hovering over an iceberg. YouTube user 235FireFly posted the video of what looks like a white object spinning around the of an iceberg in Newfoundland.

He stated that while he was driving around Salvage, Newfoundland and Labrador looking at icebergs he noticed a white chunk of ice barely attached to an iceberg.

“What you can see is a white object not attached to the iceberg, but rather spinning around and changing shape.”

The video has quickly gone viral and there has been much speculation as to just what this object is.  One commenter has guessed that it could be an alien ship using a cloaking device.

The best guess is that it is simply a mirage, case closed. More specifically a Fata Morgana. The National Snow and Ice Data Center explains that this type of superior mirage appears

because of the weather condition known as a temperature inversion, where cold air lies close to the ground with warmer air above it. Since cold air is denser than warm air, it bends light towards the eyes of someone standing on the ground, changing how a distant object appears. Superior mirages can produce a few different types of images: Distant objects can appear to float high above their actual position, for example a boat can look like it is floating in the sky, or an object below the horizon can become visible.

What do you think of this video? Is it just a mirage or is it something more than that?