I recorded my desktop with quicktime (for a tutorial I am making) on an iMac and the output was a .mov file.
I edited and deleted scenes with openshot and know I don't now how to export it to a .mov file again.
I know the video format is supposed to be .mov but the codec I am not so sure about that h263, h262, libvpx?
this web site http://www.h263l.com/ explains in great detail and depth. From my experience in usng Openshot using the drop down menu you can change your preferences and this web site will also answer in more detail http://www.openshotvideo.com/