How far down was the camera?
To me, it looks like it could be the top of a submersible with the drop pipe broken off.
That is a pit-less adp.
The thing in the center is a thread protector. The well co. that set the pump has the tool to remove the plug, and screw in a piece of pipe to pull the pump out.
Travis
I bet I could remove it with a socket if I had a long enough extension.
Remember, you have to get it out of the pitless pipe too.