hi...have a surprise for you...
came back to the playback support...
Update the app store idmss...
nvr playback device also has the support of 3216..
I downloaded from the app store america..
new version 3.00.0 updated...
I can concur that the latest 3.0 version of iDMSS Plus resolved my "It does not support the resolution" issues as well! Playback works great now.