Australia can be a very expensive place to ship to. Filling the return leg is one of the problems.As I understand it, ships that Tesla use to ship cars to Europe are Tesla charters, an entire ship with nothing but Teslas onboard. They use the Shanghai South dock where that video was filmed as its closest (5-10 min drive for the car transporter) and convenient for Tesla.
The NZ and AU bound cars get loaded on board a regular scheduled RORO service alongside whatever else is being shipped to NZ/AU by other manufacturers, those are handled at Haitong (which is over an hours drive from the Gigafactory) . So the Paganella which is NZ bound has just departed the Shanghai main automotive terminal could have a bunch of MGs, BYDs, Great Wall Motors and forklifts etc as well as our Teslas.
Paganellas' next stop is Masan in Korea, where she could unload some Teslas (?) and load a bunch of Kia/Hyundai etc, then on to Yokohama where she could pickup Japanese new or used cars for NZ.
Maybe one day Tesla will start chartering ships for NZ/AU, we are probably at about the level where one full RORO ship per quarter could be justified.
If Tesla chartered a one-way leg they would probably end up effectively paying for the empty return leg too.
There are other probems with Australia shipments and that is the closed shop nature of the dock workers and handling agents. I won't stray further: suffice to say Ned Kelly is alive and well making a healthy living in the docks.