Try system click here,
Video, then Acceleration, set Decoding method to Hardware accelerated. Now highlight underneath, Libstagefright and MediaCodec.
Now go to system in the main menu and check video output match your tv and make sure " use a fullscreen window rather then a true fullscreen is highlighted.
Now go to Audio output and make sure it matches your Tv.
To get these settings you might have to scroll down the side and change setting level to addvanced or expert.
If it still doesn't work change one back at a time. If still no luck then start again and this time run are 1st Confluence skin. I'm out all day now so hope it works for you.
Dave