I have a Qsee QT428 and I have tried all sorts of settings in Blue Iris version 4.4.8.3 x64.  I cannot get a connection to work.  I have BI working with my Reolink and Foscam cameras just fine. 
  
Anyone know where I can get settings for the QT428?  I connect via the web browser on port 83.  Here are the results of the Find/Inspect button in BI: 
  
Opening port 83... 
HTTP Get / request... 
OK 
ONVIF GetSystemDateAndTime 
HTTP 404 
Opening port 8999... 
ONVIF GetSystemDateAndTime 
HTTP 12029 
Checking for common cameras... 
Foscam FI86xx/98xx compatible? 
Foscam FI89xx compatible? 
Foscam FI9821 V2 compatible? 
Foscam FI9821 media port compatible? 
RTSP port open? 
RTSP port detected! 
Done