I found a Xoom with 4.0.4. What I'm seeing is that the video plays, but approximately 40% of the video is cut off/black on the right side. Trying on a Samsung S2, with 4.0.x, I got the same issue. Is this what the customer is seeing?
I'm not sure at this point if this was a bug in Android 4.0 and fixed in 4.1, or something we're doing wrong. I'll send an update once I know.
-Dave