I found a great software converter :http://www.tuneskit.com/tuneskit-for-mac.html
this works very well with items you have in your iTunes library it does all the work files come out as MP4 x 480 resolution, after the files runs, simply dump the files onto your USB stick plug it into the reader in the center console under the armrest and you should be able to see the media choice come up on your system under media. i am still playing with files sizes but so far a SD movie converted seems to play pretty well.