I am having the exact same problem with Orb that you are having. Orb audio works fine, RM video from other sources works fine. When trying to watch video from Orb, MPlayer opens, it looks like the video is trying to load for about 10 sec, but then gives up. There is no error generated.

I have installed MPlayer and all dependent libs many times with no change. I have installed Orb and Real Player a few times on 2 different systems, with no change.

I have tried lots of different bit rates from 2 different networks.

Also, I am booting from MMC.

I know that a lot of people have no issues, but there must be something that stops Orb from working correctly for some people.

Thanks