Mysterious UFO cloud spins like a disc for hours in the sky on the same spot above Hawaii

A rare sky phenomenon was captured by the skycam that is positioned atop a volcano dome in Hawaii on February 11, 2017.


A cloud like a disc spins for hours in the sky on the same spot.

How is that possible but it's the only cloud that does that and doesn't keep moving.

Could it be a cloaked UFO pretending to be a lenticular cloud? Anyhow something doesn’t add up in the sky over Hawaii.