A virtual camera is a software-based tool that emulates a physical camera device on a computer. It allows users to inject pre-recorded or synthetic video streams into applications that typically require a webcam, such as video conferencing platforms or streaming software. Virtual cameras are often used for adding overlays, effects, or backgrounds, as well as for privacy, testing, or content creation purposes. Cybersecurity concerns may arise if malicious software uses a virtual camera to inject deceptive or unauthorized video feeds, potentially leading to privacy breaches or misinformation. Proper permissions and monitoring are important to ensure secure use.