I have been downloading many films via Navi x onto a hard drive directly connected to the GS7. Of about 40 downloaded 15 will not play back - either through Navi X or the GS7 media player. Out of interest I plugged the drive into my Samsung TV and 13 of the 15 films worked without problem. Then I plugged the drive into my newer Samsung home theatre and all of the films played! The Samsung TV is is a 2010/11 model and the home theatre 2011/12. It would be useful if there were some media player choices on the playstore - at the moment there are none, yet on my phone there is MX player and a few others but ideally a firmware upgrade with some more video formats supported would be appreciated.