Edit the videoconferencing using a Google calendar add-on
When using a Google calendar add-on to add a videoconference link to any Smart 1:1 event, it will overwrite any existing videoconference information for all events in that Smart 1:1's series.
Note: The only editable field in Google Calendar that will apply to all events is the videoconference field, which is typically reserved for Google Calendar add-ons.
Edit the videoconferencing using the Location field
Pasting a link in the Location field of a Smart 1:1 from Google Calendar will only add the videoconferencing for that specific Smart 1:1 event.
Note: If you use a Chrome extension (e.g., Zoom's Chrome extension) to add videoconferencing, that integration may use the Location field on the event.