: Once the storage (such as a 32GB SD card) reaches its maximum capacity, systems are often configured to overwrite the oldest IDs first. Troubleshooting & Playback Issues

: This is likely a unique identification "stamp" or sequential numeric ID assigned by the Video Management System to ensure the original video cannot be altered, maintaining a solid chain of evidence.

Surveillance files of this type generally follow these standards:

: This typically indicates the file originated from a device using RTSP (Real-Time Streaming Protocol) , which is the standard for IP cameras and NVRs.

: This typically denotes the specific channel number or camera index on a multi-channel DVR/NVR (e.g., the 32nd camera in a system).