Google has updated its video structured data documentation to support creator property and it has updated the interactionStatistic in VideoObject structured data. Google said these updates are to "to document support for the creator and author properties, and clarify supported interaction types for interactionStatistic in VideoObject structured data."
Here is a screenshot of the added section for the creator property, which notes support for author:
Here is the updated interactionStatistic section:
You can compare the live document to the archived document to see the full list of changes.
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