He's just talking about a legal reorganization. "Uber Drivers LLC" contracts the employees which is wholly owned by Uber. I don't see how this would actually help them though. Under the new law, Amazon Flex drivers are also categorized as full time employees and the child company would still bear the costs of that
They’re actually talking about Amazon’s delivery service partner program. It’s where Amazon helps people setup independently owned delivery businesses. https://logistics.amazon.com/