Hi Mik,
The reason we are not supporting FTP/NFS is because this is already a supported feature by windows itself.
You can setup your PC as a media streaming source by going through: Network Settings -> Sharing Options -> All Networks -> Media Streaming -> Choose media streaming options, and turn on the streaming option.
Then make sure your pc is connected under the same wifi as your mobile device, and you can stream through the Network option in SKYBOX.
The media folder might be empty at first, but you can add videos to it on your PC by selecting your own PC in Network (under Media Devices) , which will open up the Windows Media Player, and you can select/open the folders containing your movies in the Windows Media Player. Then they will show up when you try to access your PC from you mobile device through the Network option.
Let me know if you have any questions.
Andy