Since no one seems to know - I did try to view a BVR file from that specific camera using the web viewer, and the playback was just fine. Still don't know what's going on with playing it locally.

Running Blue Iris 4.7.6.2 Windows 7 Ultimate x64, SP1 Intel i3-4160 CPU, 3.6 GHz 8 GB Ram Motherboard Gigabyte Z97M-DS3H Hard drives: Hitachi 2TB 5940 RPM, WDC WD10EADX-00TDHB0 1TB Running dual monitors OK, now the above is out of the way, have a weird issue. Recently I changed one camera to record ...