We bought my father in law a Roku last year, and he uses it to watch Netflix and some other stuff now. This year I'd like to get him set up to do some local streaming. He has a lot of DVDs of older TV shows and such that he never watches due to disc laziness.I know the Roku is no Boxee or WDTV, but can it stream local content effectively? Ideally I would just put a bunch of stuff on a thumb drive or something for him, nothing too extreme. Can Plex be used to do that, or does it require a PC to stream the media?