I got the impression that this is not formal field service but informally seeing someone wearing a mask and commending her for that. From there she went on to say she is a JW and not currently going from door to door but they exchanged telephone numbers to keep in contact.
I would have thought that informal witnessing still comes under the heading of "public witnessing" and is currently banned by the WT Society.
These videos, as I understand it are also streamed for those with no ZOOM access.
George