*Found the MANUAL. See page 110 for video formats supported via SD/USB:
http
/service.us.panasonic.com/OPERMANPDF/E-HELP_WT60.PDF
Please note:
1) No mention of 3D
2) No mention of maximum bandwidth or other codec-specific restrictions (such as HP4.1 etc)
3) No mention of ISO (single image to keep menus etc).
So it looks like you can play 2D content that meets the requirements here. A program like Handbrake works very well for this if needed.
The BLURAY player is the best method still it looks like for 3D movies. For 2D you can make a single, compressed file like AVC/AAC/MP4 for example, or even as an ISO (after copyright removal) via DVDFab and played back via a compatible media player like one of the WDTV media players.
Cheers.