What "massive amount of data" from Tesla? They don't send all the video back to HQ. Tesla owners have observed large uploads, but apparently they are software crash dumps.
They are not crash dumps only. It includes images along with data of area where images where taken. It's not gbs thought. They only ask the car to upload relevant needed data. Example I want you to send pictures Everytime you get into a construction zone.
It's probably a representation of the video data that has value to providing autonomy. Plus all the path & geo data. With a few hundred thousand cars collecting it, I'd say that's "massive".
You can also opt out of their monitoring of their car. I've wondered what the impact would be if I opted out on mine.