Applies to: All Reolink cameras and NVRs.
"Playback" option is only for playing recordings stored in Micro SD card or HDD inside NVR. If you use a camera with no SD card (e.g. RLC-410) or not connecting to NVR that is built with a HDD, then "Playback" option won't be used in your case. For more info, please refer to: https://reolink.com/faq/remotely-playback-record-on-via-reolink-client-from-sd-card-or-nvr/
For recordings stored on your PC HDD or external HDD, you can go to the folder and find the video files, then double-click to open with media players.
If you don't know where the local recordings are stored on your PC, you can refer to the link to find out Record Path,