After downloading videos, Nintendo Video stores them on the SD card. Videos with the decrypted SpotPass payload are stored in [[Extdata]]. Region/country info is presumably stored in this metadata.
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Downloaded videos are stored in the SD card [[Extdata]], from the decrypted [[SpotPass]] content payload. Region/country info is presumably stored in this metadata. At the end of the video file is a JPEG, which contains the video thumbnail, and various metadata in the EXIF including the URL associated with the video. The text shown on the web browser button is also stored in the EXIF.