No issues for years and suddenly every motion alert after midnight last night has no video stored in the history and live feed does not work in app/desktop. Zero issues for years and nothing changed from last video late last night which worked fine. Sounds like this is a common issue in the past others have had.
I appear to have fixed it at least for now, for those who care, by hard rebooting the doorbell by killing the power from the breaker for a minute and then restarting.
Rebooting the app, reinstalling the app, rebooting the doorbell from the app, restarting phone, all did nothing.