Germany makes a distinction between expectations of privacy and being in a public space. If you’re in a cafe and talking to someone at your table, you generally do not expect others to participate and listen to your conversation, that can be enough to be considered private and would likely be illegal to record without consent. The act of recording audio is in itself restricted, though if you share you can have additional charges. I’m pretty sure that makes always-on video recording (with audio) very much incompatible with German laws.
It’s an ok system but too restrictive and outdated IMHO, so many people recording something with their phone will unwillingly record people passing by, which is likely not allowed.