Flipped video in Mocha

It does not surprise me that goofy things happen when running in experimental environments like Virtual Box. Developers like Boris FX and Adobe usually don't test or troubleshoot problems because the user base is so small, and there are already enough problems trying to keep up with OS updates. 

If an MP4 MPEG file flips upside down and a ProRez is normal, then the problem is in the way the machine is decoding the video. If the video was rotated or scaled, or effects have been added to the layer, all of those modifications will be ignored when the layer is opened in Mocha AE or Mocha Pro.

The only suggestion that I have that might have a chance to fix the problem is to Pre-compose the footage layer, make sure you trim to the layer length, and move all attributes to the Pre-comp but do not open it. Then try adding Mocha AE to the pre-comp. If there are decoding or transform issues with the footage, that will probably solve the problem.