Clay Tile Weeping Interior Basement Question

We live in the Northeast in a house built in 1970's and they used a clay tile weeping system with gravity drain

There is one drain pipe that feeds the submerged crock. I don't see water coming out of the one drain pipe. What would be the reasons that the only drain pipe is not extract the ground water into crock?

Is it possible to put a camera inside the tiles to get a better idea of the condition of the system (will it go around the corners)?
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