38499-70 701531471561_sub_f_1532161730.mp4 -

: Often signifies the recording type, such as "File" or "Full" (continuous recording).

: Lower resolution, designed for remote viewing on mobile devices or multi-screen grids to save bandwidth. 38499-70 701531471561_Sub_f_1532161730.mp4

The primary feature of this file is that it is a of a security recording. Because it is a "Sub-stream" file, it will have a smaller file size and lower image quality compared to the primary recording, making it easier to share or upload. : Often signifies the recording type, such as