The last update has crippled the playback ability with an error that says "UH OH SOMETHING WENT WRONG TAP TO RETRY" and when you tap again, it doesn't work yet again. NVR N8418A sent feedback but may be to overwhelmed to respond. Reddit users posting same errors in hoards. Thanks for crippling my security camera system with an update that has failed miserably. App version 4.7.5......time to revert back to previous release.