@greg_868971036258457 sort of same problem here: although I can view the camera feed pretty well with the Reolink app on my desktop computer. It's the playback that is sluggish, up to the point of not being able to watch any pre-recorded video. Even when downloading them, the speed is variable (100-500Kbps) and sometimes hangs.
I don't really understand why... my setup is Starlink router set to bypass, wired to an Netgear Orbi, which the PoE NVR is attached to. May it be the HDD (old/full)?