A potential future standard: a certification (like Energy Star) for cameras that function entirely without cloud accounts or mandatory firmware updates that remove features. For now, you have to research carefully.
Most homeowners are unaware that privacy law has not kept up with technology. In the US, no federal law specifically governs residential security cameras. Instead, we rely on a patchwork of:
Blockchain-based storage (e.g., Filecoin for security footage) promises that only you hold the encryption keys. However, this is still nascent and user-unfriendly.