When I go to some sites with videos and click on them, the Vox gives me a choice to watch using Kobo's Gallery Movies or ES Media Player. Originally it didn't use either of these, but played them directly (flash?) like my desktop computer does. When it started using these media players, it would play full screen (landscape) but now these players only play a small landscape screen with the device in portrait mode. How can I get the Vox back to playing videos full screen in landscape mode?