: This typically represents a timestamp or index . In many DVR/NVR systems, it refers to November 12th or the 11th and 12th segments of a sequence. The _1 often indicates the first camera channel or the first file part of that time block.
: Indicates the video resolution is High Definition at 1920x1080 pixels . This is standard for modern cameras and requires compatible hardware like the AMD Video Coding Engine to encode or decode efficiently. 11-12_1__HD_1080p_nkdammp4
: The file extension for the MPEG-4 Part 14 container, which is a universal format for video and audio playback. Common Sources for This Naming Style : This typically represents a timestamp or index