Would it not be great if Teslas cameras functioned as Dash Cams? They are just missing a loop recording option and a way to view and download. Is that really a lot to ask for?
This might be practical with AP 2, depending on exactly what that turns out to be.
The current front camera is a fairly narrow angle monochrome unit, and thus not well suited for dash camera duty.
On the Model S the raw feed is processed by the AP chip on the windshield, connected to the rest of the car only by CANBus. (Not sure how the X is set up here - the EyeQ3 chip isn't in the windshield.)