Just set up an RLN8-410 NVR with 5 cameras. Everything works great except playback over any of the network clients (PC/Mac/Android) fails. Recording does take place and playback over direct HDMI connection to NVR works just fine.
Running latest NVR/Camera firmware and client software as of 7/25/2018.
PC Client: dragging a channel into a playback window and hitting play produces no result, fast forwarding has no effect although time slices are visible.
Android: Attempting playback runs the spinner animation for split second followed by “Playback failed” message.