Replaying the video zooms on iOS.

So the first viewing is ok, but if the video is played again, it zooms itself so that it no longer fully fits on screen. The behavior seems identical on iOS simulator and device.

I included a fully functional testcase that illustrates the issue. It has a 4 second test video embedded and compiles out of the box.

Note that it can also be run on OSX Desktop, where it works as expected.