In Italy the Law is different, AFAIK there are no prohibitions on filming in public (be the target ordinary people or police/law officers) the limitations come

In Italy the Law is different, AFAIK there are no prohibitions on filming in public (be the target ordinary people or police/law officers) the limitations come into place when/if you want to "diffuse" the filmed material (i.e. post the video on social, youtube and similar), you need either an authorization[1] from the people filmed or you need to make them not recognizable (i.e. pixelate/obfuscate their faces and/or other recognizable areas). I believe there are some exceptions, like public gatherings and similar and the purpose for which the video is published/made available but I think it is a fine line to walk on. From what I understand about this specific device, the whole idea circles around Meta/Facebook (i.e. to publish the taken videos) and from a legal viewpoint it is likely to open a large can of worms. [1] this takes the form - in theory - of a signed declaration by the subject including name, surname, address, etc. all "sensible data", I don't think anyone has ever done this outside professional filming