Who's the class and who are they suing?

If someone at a DSP (which is an Amazon contractor technically) records or otherwise mishandles these videos, how is Amazon legally responsible?

Amazon has some pretty deplorable practices, especially on the delivery side of things. But the law doesn't even recognize Amazon drivers as Amazon employees. IANAL, but you have contractors working for various third parties. And it looks like the third parties (the DSPs) are leaking footage. Doesn't seem likely an individual would have a case against Amazon, much less a court actually certifying a class action.