Metallic Orb Rotates on Video near Holland

The following video was shared by a woman who was traveling on a train to northern Holland.

While traveling, she decided to record the landscape through her window,
but suddenly, a mysterious sphere that seems to be metallic appeared floating in the middle of the field.

This sphere is rotating on its own axis, which is quite intriguing.

What do you think this is that is levitating in the middle of nowhere?