Yes, real-time video footage from surveillance cameras can be tampered with through specific technical means. These means include, but are not limited to: 1. **Hacking**: Attackers can hack into the surveillance system through the network and gain control of the camera, thereby tampering with or deleting the video footage. 2. **Video editing software**: If the video footage is already stored locally or in the cloud, attackers can use video editing software to edit, modify or re-encode the video footage. 3. **Signal interference**: Interference with the surveillance signal may cause the video footage to be distorted or unable to play normally, providing opportunities for subsequent tampering. 4. **Counterfeit hardware**: Some advanced attackers may use counterfeit cameras or video recording devices to make them look real. 5. **Built-in vulnerabilities**: Some surveillance equipment may have unpatched security vulnerabilities that attackers can exploit to tamper with the footage. These actions are usually illegal and will be subject to legal prosecution. It is very important to protect the security of surveillance systems, and companies and individuals should take appropriate network security measures to prevent such incidents from happening.