Attached latest firmware with Hikvision-like interface.
Steps performed: reset camera to default settings. Ran upgrade using IPCSearcher tool. Reloaded webpage, prompted to install updated plugin. Logged in to the camera web interface and reset it to default settings one more time.
Observations. The zoom in/out still lags behind when clicking buttons, it's nothing like Imporx/Huisun mini PTZ which is very responsive. Also, the Zoom In/Out is reversed initially I though something was broken with zoom control.