: This signifies the video resolution— High Definition (1920 x 1080 pixels) .
: This often indicates the camera channel (Channel 1) or the first file segment of that day. 20211108-1_1080pmp4
: If this is security footage, it is best practice to keep a backup on a separate cloud drive or external HDD, as these files are often overwritten by NVR (Network Video Recorder) systems after a set period. : This signifies the video resolution— High Definition