Sorry I am sure this is covered some many years ago. However using older FW (One it came with new) I tried to playback footage that I have recorded on Sub Channel and when I try to do this from the GUI of the NVR I get a Black Screen with a Red Lock at the bottom left corner.
I can however playback footage without an issue using WebUI
What am I missing without saying install the new FW lol.
4108E-HS older FW can't playback Sub channels?
4108E-HS older FW can't playback Sub channels?
Here to help the best I can.
Be Safe
Be Safe