https://en.wikipedia.org/wiki/Dashcam#Legality
Citat:
While dashcams are gaining in popularity in many parts of Asia, Europe (particularly UK and France), Australia and the US, they are forbidden by law in Austria,[12] where they carry heavy fines. In Switzerland, their use is strongly discouraged in public space as they may contravene data protection principles. [13] In Germany,[14] while small cameras for personal use in vehicles are allowed, posting footage from them on social-media sites is considered a violation of privacy and thus forbidden. Dashcam footage is only in exceptional cases admissible as evidence in a German court. In Luxembourg, it is not illegal to possess a dashcam but it is illegal to use one to capture videos or still images in a public place (which includes in a vehicle on a public road). Recording using a dashcam may result in a fine or imprisonment.[15] In Australia recording on public roadways is allowed as long as the recording does not infringe upon one's personal privacy in a way that may be deemed inappropriate in a court of law.[16]
In the United States, at the federal level, "the video taping of public events is protected under the First Amendment" right.[17] Videotaping of non-public events and videotaping-related issues, including sound recording and matters related to time of the day, venue, manner of recording, privacy concerns, implications on motor vehicle moving violation issues (such as whether the windshield view is being blocked), etc., are dealt with at the state level. In the state of Maryland, for example, it is illegal to record anybody's voice without their consent, but it is legal to record without the other party's consent if the non-consenting party does not have a reasonable expectation of privacy with respect to the conversation that is being recorded. In other states, including Illinois and Massachusetts, it is always illegal regardless of whether or not there is a reasonable expectation of privacy, and in such states the person doing the recording would always be in violation of the law. In Illinois, a law was passed that makes it illegal to record law enforcement officers even while in the performance of their public official duties.[18]