For the fmv no sound problem go into audio settings and enable spu sync.
The verson of Final Fantasy IX im useing works fine its a PAL verson of the game so.
There is a couple of things you can try, if you loaded a bios make sure you disable HLE Mode and save that as the default config ( make sure when you load ff9 that it hasent loaded it own settings by going back into the settings page and checking everything is set right )
If that doesnt work try backing up the memory cards and uninstalling the app then reinstalling. I know this sound tedius but its fixed 90% of problems i have had.
I don't know where the memory cards are stored ( on the sd card or internaly ) so you might have to be rooted.
Dell Streak @ 1.5 Ghz
StreakDroid 1.9.0 - Rooted - Unlocked