Google doorbell cameras send clips to the cloud. They're accessible to users for 3 hours for free, and a month or two if you pay. While they become unavailable to users after 3 hours, it's unlikely that they're deleted immediately—partly for operational reasons (easier to clear out many clips periodically in a batch process, rather than individual clips one by one exactly when they expire), and partly because Google keeps a lot of data around for a short period (a week or two) to be able to debug systems. Even when data is requested to be deleted, it's often possible to recover it from off-site backups or soft-deleted data stores for a while. Google ensures that all user data is actually, irrecoverably deleted within 2 months after a deletion request (see https://policies.google.com/technologies/retention).