Some of us here have also set up Plex Media Servers for movies, TV shows and music. I don't use PlayOn, but I have built a pretty good library from ripped CDs, SA-CDs (I'm a sucker for 5.1/Quad), DVDs and Blu-Rays that I down-convert to flac, dts wav, 480p, and 720p (respectively) to save disk space. The TV has a pretty good connection using the 5GHz Wifi and the server's wired by ethernet cable, so am able to just use the house LAN. If PlayOn just gives you a standard mkv or mp4 file, I'm sure Plex would have no problem serving it.
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