Here is another camera rig that lets you capture overhead videos like a pro. The Glide Gear OH 150 is a modular 4, 8, or 12 foot overhead system. It is C-stand, junior, or tripod mountable. It allows you to use multiple overhead cameras and lights to capture professional videos.
The package comes with 3 x 4ft rails, 2 stand adapters, 3 track spacers, a ball head, and a 4-inch riser. Costs under $300 at this time.