From a technical perspective, there are means to tamper with the real-time video footage of surveillance cameras, but this is illegal and a serious violation of regulations. Some people with professional skills and malicious motives may try to tamper with it in the following ways: 1. **Attack storage devices**: If the video is stored on a local hard drive or other device, the integrity of the stored data can be destroyed through network attacks, malware implants, etc., and then the data can be modified to achieve the purpose of tampering with the video. 2. **Interfere with signal transmission**: Interfere with the signal transmission line between the surveillance camera and the monitoring center, intercept and tamper with the data during the signal transmission process, and then send the forged data to the monitoring end. Surveillance videos have important evidentiary value in many scenarios. Tampering with surveillance videos is a criminal act and will be punished by law. Formal surveillance systems also usually have certain security protection mechanisms to prevent such tampering.