If a folder does not show expected videos, check the source folder before changing playback settings.
- Make sure the folder contains the video files you expect.
- Check that your Windows account has read access to the folder.
- Open Library → Manage Folders and check that the intended folder is included.
- Use the Library refresh control, then check All Videos and Search videos again.

A visible library item can still have a separate playback issue. If it appears but will not play, use the troubleshooting guide.