There has been some discussion about the intention of the different PV types.
The current policy is that the “original” PV type should be used for the first authorized PV for a particular song. In this case authorized means that the person uploading the PV had permission to do so. The reason for this requirement is that original PVs are promoted as official, and displayed separate from reprints and “other” PVs. Promoting PVs that use content without permission as official might insult the creators of original content, which in turn makes VocaDB look bad, so we want to avoid that if possible. We’re doing this to support the creators, whether they’re doing it as a hobby or professionally.