Basically I don't want to lost any feature that camera offer. I mean IVS, motion detection, etc. So 5000 series will be ok and even more that what camera can offer?
5000 series is the best way to go yes. It will work fine with most all Dahua cameras.
Rule of thumb is to make any setting that can be done on the camera, on the camera. Use the NVR interface primarily to set recording schedules and basic networking.
I have problem with Live playback. I choose camera and it looks like it want to play substrem by default. I have disabled substrem. How to set default view and parametrs so I don't have to choose camera and mainstream every time?
Last question. I can't find. I can't download file through web interface? I don't see any download option or scissors icon. Only way to download is via PSS app?
My interface is little poorer than this on the picture.
You MUST use IE browser to see the snip tools and others for download on the NVR GUI
Otherwise yes Use SmartPSS on a computer on the same network. Its a much better interface and more flexible for playback/download and live viewing.
* Just dont try to use it ti make setting changes. Use it is a live view/playback/download software and you'll find it much better than the NVR GUI for that.