The legality of using hidden hotel room cameras as evidence in legal proceedings can vary depending on the circumstances and jurisdiction. In general, if the camera footage was obtained legally and without violating any privacy laws, it can be admissible in court. However, if the footage was obtained illegally or without the consent of the parties involved, it may not be admissible and could even lead to legal consequences for the person who installed the camera.
Additionally, even if the footage is admissible, it may not always be considered conclusive evidence. Other factors such as the credibility of the witness who captured the footage and the authenticity of the footage itself may also come into play. It is important to consult with a legal professional to understand the specific laws and regulations governing the use of hidden hotel room cameras as evidence in your jurisdiction.