Hi Greg-
Keep in mind that it must be a valid SSL certificate, not a self-generated one provided by the NVR or generated locally. Considering that SSL certificates from public CA’s can’t be generated for an IP address, I’d have to assume that it’s a self generated or other scoped certificate.
I would recommend checking the following article for common problems with local IP cameras particularly on the LAN and using HTTP when a valid SSL cert isn’t an option: Google Chrome - Mixed Content - Media Not Showing
If you still need further help after that, I would recommend reading the Effective Ways to Seek Help and Troubleshoot article and the associated checklist linked within.