OK, I'm not a lawyer but I can at least say  :hiya: from somewhere just north of London

For those interested, in New York, it is called "unlawful surveillance". Here is what the New York Penal Code says: http://ypdcrime.com/penal.law/article250.htm#p250.40 To be guilty of the primary offences of unlawful surveillance in the first or second degree, you must install or use a surveillance device. These are felonies. Watching a video created by someone else is not covered by this law. The separate offences of "Dissemination of an unlawful surveillance image" in the first or second degree, require "knowledge of the unlawful conduct" involved in obtaining the images (i.e. knowledge of the installation or use of the unlawful surveillance device). If you did not take the images yourself, or did not actually know who took them, I think it is safe to say that you will lack the knowledge required to be guilty of these offences. These are misdemeanors, not felonies.