Hi jtman,
Thanks. Recently, I've had some experience with recording Go videos.
For example, your Sanyo camera's built-in mics are likely omni-directional.
The resulting audio may be a little echo-ey.
This is because omni-directional mics are designed and intended to pick up
the ambient sounds from all directions, so they also pick up all the echoes
from your walls and other hard surfaces in your space.
It depends on factors such as the shapes, materials, and angles of the surfaces.

Or carpeted floor versus wood floor.
Or the angle of the mic(s) relative to the Go board surface.
If you have access to, say, a RØde directional mic,
you may notice a huge reduction of the echo-ey feeling.
