The answer to this question depends on the specific circumstances surrounding the use of the hidden camera. In some cases, the footage captured may be admissible as evidence in legal proceedings, such as if it was used to document a crime or other illegal activity. However, if the camera was used to capture footage without the knowledge or consent of the individuals being recorded, there may be legal and ethical issues surrounding its use as evidence. It is important to consult with a legal professional to fully understand the implications of using hidden cameras in public spaces and their potential use as evidence.