Not sure if anyone else needs this but I just went through tier 2 tech support to update the firmware on my Costco Swann system to get remote playback working on the Swannview Plus Android app. This update fixed it but allows one to remotely play back only recordings from after the firmware update, at least for me.
v3.0.8 build 140919 was on my NVR from the factory.
This is v3.0.8 build 141009.
http://www.filedropper.com/digicap