kungraph
Hello,
Sorry for the inconvenience caused.
AirScreen doesn't support showing custom thumbnails right now.
If you are using Win 11 PC, you can try turning on SMB File Sharing on your PC and access the files via SMB protocol.
Note: when accessing files via SMB/DNLA, SKYBOX sometimes requires a restart to properly display custom thumbnails that have the same filename. Also, please ensure that you put the .JPG images and the video files in the same folder.
Hope it helps. Feel free to contact us if you have other concerns.