Great!

But in this video he is traveling in circles in an empty lot, whereas in the iPhone video he was traveling down the sidewalk. I guess he tried to film it in a couple of different ways?

YES!. People have been curling soccer balls for many years - it's a matter of kicking the ball in the correct manner to make it spin through the air.

I refuse to believe that a spherical object in motion will naturally assume a spiral path - that's nonsense.