Thats because that player supports AV Connectivity.
From the manual:
What does the “AV Connectivity” mean?
Although a normal ODD cannot be connected to a TV directly, the product can be
connected to devices (such as TV) that support USB interfaces and can then be used
as a USB memory device. “AV Connectivity” refers to this functionality
When you say that it plays DVD’s do you mean commercial protected DVD’s or some that you have made.