The popularity of recording cameras in cars is increasing, but on a European scale it is a complex issue. In other words, cameras are legal somewhere, you may not publish the recording elsewhere, and somewhere you may not have a camera at all.
In the Czech Republic, no one objects to a properly placed camera (it must not obstruct the view), however the protection of personal data applies, so if you film someone who does not give you consent to publish it, you should not publish such material, or to anonymize the person. And this also applies to vehicle license plates!
However, what if an offense is caught on camera, or the video may influence its deliberations? Can this recording be used and taken as evidence, whether in criminal or judicial proceedings?
It is a guaranteed fact circulating on the Internet that the camera may be in the car, but that it has no weight in offenses or courts. We therefore decided to ask the highest places and the following answer came from the Ministry of Transport.
Recordings from car cameras can be considered as evidence. However, there are only so many one of the tools for proof, not the only one. In other words, all means of evidence that are suitable for establishing the state of affairs and that are not obtained or conducted in violation of legal regulations can be used to provide evidence (cf. § 51(1) of Act No. 500/2004 Coll.).
In practice, this means that the recording from the car camera can be used as evidence for criminal or legal proceedings, but it will not be the only evidence. The court or the decision-maker regarding the offense should also take into account the other evidence presented. Their invalidity/impossibility to take into account would only be if they were obtained or carried out in violation of legal regulations.