Green UFO filmed during a storm in Ontario

On November 25, 2014, a green and black UFO has been filmed since Ontario (in Canada) during a storm. What is it?

Scott C. Waring explains:

This is a great catch of a cloud orb. They are often seen around storm clouds or running from cloud to cloud. This one appears dark, but they take on the color of the clouds around them. There may have been more of them in the cloud, which cloud cause the storm to form. The sometimes make the storms on purpose for experiments. Other times by accident. SCW

Eyewitness states:

I do not believe this is a UFO. Object is quite small and Full Screen will be most helpful. This is yet another dark oval I've been able to record at high altitude within a cloud formation. Camera is fixed on a tripod and the focus is set to infinity with a 15x optical zoom. The rest of the details are in the video.