Normally we would expect no subscription means no video uploaded, but it doesn't HAVE to mean that. IF you distill it, it really only means the Ring doorbell owner doesn't get access to any video or features without paying.

There's no reason they, however, won't still derive value from it without a subscription by recording and reselling that data somehow. That's probably how they got this footage. All the subscription does it help subsidize their surveillance network and let you use it a little bit.