Question:
The Media contents are being downloaded to CRM for iPad. However, the CLM Presentation thumbnails do not display when tapping the Media menu. Why is this?

Answer:
This is because the HIDE_CLM_THUMBNAILS_IN_ALL_DIR_VIEW_vod Multichannel Setting is enabled.
Enable the HIDE_CLM_THUMBNAILS_IN_ALL_DIR_VIEW_vod Multichannel Setting to hide thumbnails when the user taps CLM Presentations in Standard view and Training Presentations in Training view. Thumbnails continue to display in customer-managed directories, unassociated, and My Presentations (if applicable).
Related Documentation:
CRM Help Documentation: Using Default Directories