If you are getting this unsupported content warning over your video then follow these steps to remove it.
While playing the video over USb,
Goto Options- Picture Options- Picture, Press OK
Voila.. Error warning is temporarily gone if you continue to watch it. If you pause or rewind/forward error will again pop up, in that case repeat the same step.
Hope it helps.
This problem occur while playing *.mkv files to many Sony Tv including 2014 Models.
