Sync mdia within an internal wifi hotspot

Technically, an app can be written to do it, but I don't think there's an Android device yet that's powerful enough to do the work necessary. Watching them from the same external hard drive (or the same desktop computer) would be so much simpler.

BTW, no matter how you do it, they won't both be playing at exactly the same time. Each stream is separate. That's why, if you have 2 TV boxes, and watch the same show on both, you'll notice a lag between them.)