I know tesla has all those cameras, but from what I understand they dont 'record' or saving the recording unless you beep the horn? Should I get a dashcam too? Or do I need to setup the 'built in' dashcam to do some kind of continuous loop without having the beep? (and my understanding is the most you can record is a 10 minute period?), what if I see something happened to the car days later and I want to go back and look at footage, it wont be there unless I get a 3rd party dash cam, right ?