Flock Said Its Cameras Don't Track People. Then a Reporter Proved Them Wrong On Video
(www.gadgetreview.com)
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
Not sure public video recording amounts to a search and seizure. Is there case precedent establishing specifically that?