There are two explanations for the video published:
1. They DO have cameras onboard with the exposure settings necessary to see the woman in the video, and have not released the video because it makes for bad PR.
2. They DO NOT have such cameras, in which case they should have their self-driving permit revoked because this failure mode is completely predictable to anybody working in this space. And anyway their LIDAR should've detected the person.
Because the alternative to an AV is a human. So the only thing at all that matters is "is this better or worse than a human".