I was happily using a Raspberry Pi in my office. I bought the Android TV for the lounge TV.
The Raspberry Pi takes some setting up, you need to configure it via command line or configuration file editing but it works pretty well on my Pi 3. Heres the guide I used. Hikvision Raspberry PI as Viewer
One thing to note is I haven't tried it with H265, only H264. I haven't setup my new office yet so I'll try it at some point.
If you search Google "raspberry PI Hikvision" there are several topics on it.
I have the same problem. I am moving to a new home soon and are looking for a security camera setup with a NVR. I am interested in this setup too but have seen the swann systems popping up everywhere and are much cheaper. Are these systems worth the money or should I stay clear?