My problem. When I select Videos the next screen only shows /var. When
I select that the screen becomes black.
Are you using storage groups for your videos?
What does mysql -u mythtv -p mythconverg -e "select data from settings where value = 'VideoStartupDir' and hostname = '<backend hostname>'" say?
Finally, could you start mdd in debug mode (on your backend: killall mdd; mdd --debug --backend), try again and then send us /tmp/mdd.log?
Thanks,
foobum