I can confirm that
find /usr/share/mythtv/themes/ -name "video-ui.xml" -print | xargs sudo sed -i 's/enterimdb/entertmdb/g'
fixes the issue.
I can confirm that
find /usr/share/ mythtv/ themes/ -name "video-ui.xml" -print | xargs sudo sed -i 's/enterimdb/ entertmdb/ g'
fixes the issue.