Ironically, those questions are more legal than Flock's current usage. The vast majority of Flock's revenue comes from government, and government cannot hire a 3rd party to do what would be unconstitutional if done directly. Thus far, pervasive monitoring without a warrant has been considered an unreasonable search.

[Edit: I think Flocks "victims" have a decent argument for injunctions for the removal of the cameras on the basis that Flock is conducting an illegal search on behalf of the government.]

However, the government can generally do what the public is allowed to do. So, if there are companies serving a genuine market for monitoring your employees, etc. via video surveillance installed on private property... then the government would not be restricted from accessing what private businesses have access to buy.