My impression is the charging stations have cameras to deter and catch thieves. Tesla isn't looking at your camera feeds unless you've enabled the right data sharing setting, in which case I imagine they could. Otherwise the charging stations / video comment is pointless because they could have watched the driver the entire way, not just at the stations.

Edit: Also the sharing of camera feeds if enabled, I'm pretty sure is only the external cameras, not the cabin camera.

And yes if you go to a charging station, of course they know you were there and can track your path between stations. You use a credit card when you're at them and it authenticated your vehicle.