Any chance this "app" could become more of an HID type driver that could be activated by a half press of the camera button when you have text box highlighted where it will recognize the barcode and enter it into the form automatically?

DVD barcodes are pretty reliable to test as a web lookup. They should come up if you search directly on Amazon, otherwise Google will usually show it up in a product search. I'll see if I can find the site again that attempts to document UPCs/EAN codes, as they are supposed to be unique unless they are an "internal only" code.