: Ensure you aren't viewing the same cameras on a tablet, PC (iVMS-4200), and phone at the same time. 2. Adjust Playback Settings
Every Hikvision NVR has a "decoding capacity" (e.g., 8-ch @ 1080p). Attempting to play back multiple 4K or 8MP streams simultaneously can quickly exceed this limit. hikvision maximum number of channels under playback reached
Log out of Hik-Connect on other devices, or close playback sessions on the local NVR monitor. : Ensure you aren't viewing the same cameras